I have "TICKED-OFF" many folks with this lil' gem.
One example I can specifically remember:
Two friends of mine (brothers, actually), were going at it, one was attacking the other with a huge Fattie flyer (can't remember what it was), he was about to knock his bro' down to 4 life and I was next on his hit list. So, in desperation, I Blood Frenzied his flyer therefore killing his brother and then he had to bury his flyer at the end of the turn, which gave me just enough time to kill him.
The look on their faces was,...well, you'd've thought I was Judas or something