Maybe they were made in Mexico, where the water supply, leaves something to be desired.
I had Montezuma's Revenge in Mexico, and I took it home with me.
Not an enjoyable experience for sure.
Funny comments but.........butt.................
The guy who said he was going to take these to work and watch what happens, I think, that is a bad idea, on so many different levels. I sure hope he was kidding.
__________________
"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).