"I need a what?" Rincewind quavers. Whatever it is, it sounds painful.
He plods back to the table and can be seen talking urgently to the people sitting there. He gestures wildly, nearly knocking over a glass. The jolly boys shake their heads and look stubborn. Rincewind pleads one more time. The biggest one takes Rincewind by the arm, turns him about, and gives him a shove back to the counter.
Nervously, caught between a rock and a hard place, Rincewind returns to Xellos, but out of the direct range of the knives (maybe). "Er, and they want that with eels as well." His shoulders slump and he looks around for the nearest bolt hole.