I fucking love Rhoto-V. Only eye drops I use now. Some memorable times from when I gave them to people who have never seen / heard / used them:

Me: *Pulls out Visine bottle* "Oh sorry man that was my acid, here take these... YOU TOOK THEM ALREADY?"
Guy: "Fuck it bro, you got orange juice?"

*While in the car*
Me: "Whoa man, never seen somebody take that much acid in their eye before! I hope your not busy for a month!"
Friend: "YOU FUCKING CUNT! AM I GOING TO DIE?"
Other friend (very stoned): "LOL Cheech and Chong moment!"

Me: "Hahahah! You have about fifteen minutes until the hallucinations kick in!"
Girl: "How thoughtful of you! My roommate just bought Pink Floyd the Wall!"
Me: "lol"