Just slightly off topic,
I work in a water laboratory and we conduct bacteriological and botanical (algae) testing under microscopes. I was giving some VIP tours through the lab and our botany/algae lab is very popular because, hey, it’s expensive microscopes and little green things wandering around infront of your eyes. I’ve given dozens of these tours! So this one guy was watching the algae frolic and roll around infront of him, and he asks one of the lab techs, “Do you have any peroxide?”, and she says “Yes, of course”.
“Great”, says the VIP, “Can we kill these now?”
Her smile and all pleasure dropped out of her face, “What… while you watch?”, she asked. Now, to bear in mind, it goes without saying that utterly everything in their lab is sterilised and disinfected every day. The lab staff discard used, fresh samples down the sink. Used slides and contaminated gear sterilised or disinfected without care. That’s just what you had to do to run a tidy commercial laboratory. But the fact that this guy deliberately wanted to squirt some peroxide into the slide while he watched – and he DID WATCH as the solution washed over them – and he kept watching for a long time after they slowed and stopped moving. The lab girls were sickened, and even I was completely thrown off for the rest of the tour.