I've had 2 of them.
A couple of years ago where I worked then I has just openned a bottle of Faygo Raspberry. I decided to add a little sugar to give it some more zing. Right after I added the sugar I started to drink it. But the sugar caused the carbonation to go crazy, forcing me to run to the sink while while still holding my mouth over the bottle to keep it from spilling all over, right in front of my Boss!!
Then, there was the time I was having a can of Coke, and I didn't want anymore. I was walking into a Department store at the time, so I dumped it upside down into what I thought was a trash can. It was one of those old standing ashtrays, where the ashes go all the way to the base of it. So, someone had fun cleaning the Coke & ash residue out of that later! 
[ 05-09-2006, 01:50 PM: Message edited by: Hacksaw ]
Life is too short to drink crummy sodas...