"I don't know that I'd call it regard," Rincewind says bitterly. "But it's certainly something. A very faint susurrus of sound, like a breeze rustling through leaves, is audible on the cusp of hearing.
"YOW!" Rincewind howls when he's touched. He doesn't look back (breaking Running Away Rule #2), but instead, bends his head and pumps his arms and (though it hardly seems possible), runs even faster.
Gotcha! Rincewind's had a lot of practice though. Xel might be surprised. ;)