Although not today (rather, a month ago), I was making pizza, and this shredded cheese was in the worst quality, yet toughest plastic I've ever handled. So I got a butterknife, and stabbed through it; my grip slipped at the worst time, and I sliced open my left thumb. Bled like a bitch; t'was painless, though.
I've got a gaping scar, and a phobia of butterknives now. No, not really. =P