Ouch

http://commons.wikimedia.org/wiki/File:A_piece_of_sperm_whale_skin_with_Giant_Squid_sucker_scars.JPG

A piece of sperm whale skin bearing scars from a giant squid’s suckers. Once thought to be legendary, the squid normally keep to the deep sea; almost everything we know about them has been learned from specimens found in whale stomachs.