My son picked out some Kickin' Cheese pringles at the store last week.
Everyone in the family has eaten one. Even the dog spit it out.
From the "Don't eat it Steve!!" website RE: Potted Meat Food Product
Okay, here we go-- Pulling back the lid (not recommended) lets loose an odor that punches you in the nose like a stinky fist. If you've ever smelled a can of dog food, it's just like that. Only imagine you are opening the can while your head is wedged in a horse's ass.
Yep, that's the smell I remember.