why does the yoplait spit at me?

I used to eat Dannon's yogurt. My wife prefers Yoplait. OK, fine, I'm
not going to the mat over yogurt brand, so now I get a container of
Yoplait in my lunch every day. It's slightly different than Dannon's,
but it's yogurt, it's fine. But - Dannon's never, ever gave me any
problems when I opened it up. Three days out of five the damn Yoplait
will spit in my face when I try to rip off that fucking foil top and
I'm getting pissed about it.

.