Enjoyed watching the original
Kingsman movie, the other day (I'd caught entertaining bits of it not long before, the channel it's on being of the repeat-slot variety where prime films get a cycle of showings at times that may or may not be convenient to everyone - but I took the later opportunity to see the whole thing through again on a latter scheduling).
I mean, anyone who likes it will like it, and its deconstructing/reconstructing of the spy-action-comedy-thriller genre, but it definitely floats my boat and I'd watch it
again (if/when convenient) as soon as it comes round again on their playlist.
Something trivial that occured to me (without really featuring prominently in the plot, or at least averted/skimmed over)... Eggsy seems to have an innate refined taste (as in tongue-based), or at least a sensitivity to potentially damgerous substances in his drinks. Despite not being anywhere as used to champagne (as much as Charlie surely is), he seemed to be the only one who picked up on the "something stronger than rohypnol" in the club (though not enough to avoid the consequences), the others entirely dismissing his apparent Cassandra Truth comment as just his particular NLP approach to the task (or at least only absorbed it into their NLPing, as a feed-line). I mean, it could have been a total co-inky-dink, that he was playing the part and accidentally correct, but I think not.
Later, in the final encounter with Chester, we (eventually) know that he couldn't have tasted anything wrong with that other drink, and presumably if the maybe-later additive had normally been somewhat obvious then it would have been reformulated until it wasn't[1]. Perhaps it's just that Chester took it only as a sour-grapes (or sour fermented-then-distilled-and-matured grapes!) comment, but he will probably have been privy to the exercise tapes/transcripts from above, so perhaps he actually accepts it as a just-too-late realisation (being slightly wrong about that chronology!) as well. Though something he couldn't have expected to have done himself. (And, as it turns out...)
There's one other minor instance where perhaps this comes into play for Eggsy, but it's a lot less definite (so not counting it as a Rule Of Three/Chekhov's Skill thing)...
However Harry gets a 'nano-gel' thing in his wine, without apparently noticing[2]. Makes me wonder, though, if Eggsy (had he been already an active agent, to be in that position) would have at least been a bit more suspicious. (And, if playing the full Harry-type Kingsman, as he did once 'suited up' for the final infiltration from the plane, he would have been (unbeknownst to V) possibly far more capable of detecting the difference in normal burgers and 'gelled' burgers, entirely subverting his opponent's assumptions.)
[1] ...as an aside, at this point one wonders how they even test that. Although I suppose it has scope for 'safe' testing that an intended undetectible definitely now more traditional additive doesn't. Still presumes that the lab-testing is riskily dangerous and the field-testing is riskily not dangerous enough (presumably backup methods are on hand for the latter phases).
[2] Given his egalitarian view of class experiences, he might well have been not more susceptible to the Happy Meal food-based alternative, but you'd have thought that V would have thought he could more easily get away with the junk-food being adulterated, for someone with such an obvious outer appearance of having only more refined tastes, even after Harry demonstrated his unflappability regarding the silver-platter reveal. 'Course, it depends whether the gel is better designed to dissolve in liquid (and/or alcohol) than in burger-sauce, or how easy it was to dose a bun compared to the more normal slipping of it into a glass. (Though, in this case, he could have avoided the problem with having to only dose his visitor, as he could probably have put up with 24 hours of covertly tracking himself (and any leftovers) as well, even if he doesn't have a rapid deactivation method[3] to apply at need.)
[3] And one assumes, refering back, that there's a 'safing' method for the pen-substance, too, from the Kingsman end, at least (if they know it needs to be and the particular keyed/in-range dose hasn't been fully activated yet).
Anyway. Just a thought in passing. A what-if of little consequence to the plot as it actually was given, just a possible additional Hidden Depth, in amongst all the other Hidden Depths that almost everyone else had. (Like... How to interpret Gazelle's parting glance at the Eggsy-the-'valet' in the shop? Nothing was made of that, either, but could have been anything from "if I weren't with V, I might have a good time with you young stud" to "I haven't killed anyone for a while, but you'd be my first choice if I wasn't playing 'nice companion' on this 'shopping trip'..." Could even be both. I wonder what the screenplay says?)