What is the stupidest way you've ever cut yourself?

Once I shook up my brothers coke can (I mean really shook it up) and gave it to him to open. Excited about the prank I was gonna pull on him I started opening my coke can and pressed down on it really hard. Then my brothers can exploded all over him, I laughed for a while and looked down to see the top of my coke can was Red. I thought, "Hmm, I don't remember the top of my coke can being Red," and then lifted up my finger to see I had sliced it open. For now I open my cans very carefully.

PS- When the coke can exploded my brother got soaked