Seeing Angel bite it at Thrakhath's hands..er, claws, during WC3 was pretty cool. Especially the fact that, in the game, it was broadcast by Thrak over the comm to Blair while out on a mission... You can't get an opponent too much more demoralized than that
BTW, I thought they did a much better job on Thrak than Hobbes in WC3, as far as quality of the makeup/masks/prosthetics/etc. that served as his "howdyado" to the player. Much more realistic than Hobbes'--no wait: not more realistic, just more menacing, which was key....