Just make sure no one spits in your soda. :D
The thing would be to say you spit in someone's soda, but you didn't - or vice versa? :o
What I would do is pee in someone's soda, and then tell them I spat in it, and when they complain about it tasting weird, smell it and tell them there's arsenic in it.
I tend to over-do April Fool's Day, sometimes. ;D
;) I necro'd for pure nostalgia reasons.