Your stomach fills with gas, and before you can do anything, ti rushes out of your mouth.
"Buuuuuuuuuuuuuuuurrrrrrrrrrrrrrrrrrrrpppp!"
"Oh," You say "Excuse me."
"Not to worry" Says the hot dog man. "That drink usually does that. Have a nice day!"
You decide to wander home, noticing how your senses seem to feel sharper, for some reason, and your shirt feels tight. You're about to contemplate this when more gas forces its way out of you, only it's not out the mouth:
"Paaaaaaaaaaarrrrrrrrrrrrrrrrrrrrrrrrp!"
"Wow," you think "That stuff packs a wallop!"
You continue, ignoring the fact that now your trousers and shoes feel tighter than usual...