When a group of people laugh hysterically (normally two) and one begins to cough from laughing too hard. Then projectile vomits. The other friend laughing smells the vomit (and/or is disturbed by the sound) and begins to puke also, before you know it everyone is laughing and throwing up all over the place. Great fun.
"BAH AHAHAHAHAHA WHY ARE WE LAUGHING?!?!"
"DUDE I DON'T EVEN REMEMNER HAHAHAHA COUGH COUGH"
"AH AHAHAHAHA ARE YOU OK?!"
"OH WHAT THE HELL BRANDON THAT SOUNDED TERRIBLE....BLAAAAAAARRRRRRGGGHH"
"AH HAHA BLLLLAAAAAAAHH HAHA"
"HAHAHAHAHA BLAAAAAAAAHAHAHA CODY IT'S EVERYWHERE!!"
"I CAN'T STOP LAUGH VOMITTING!!"