The Dallas Theater Center acting company member performed this year's best scene-stealing bit onstage. In God of Carnage, the Tony-winning play DTC produced at Kalita Humphreys Theater, Sally Nystuen Vahle played a high-strung, tightly wrapped urban mommy. The play is about civilized adults who, as alcohol flows and conversations grow heated, turn into furious savages. Vahle's character was one of the calmest until fwaaaaaaaak, she suddenly stood up and vomited. Not just a little upchuck. No, a torrent of barf that sprayed over the furniture, other actors, even the first rows at some performances. It was a perfectly wonderful/horrible moment of live theater, which Vahle carried off with great flourish (the trick was accomplished with a tube, a throw pillow and liquid chunked with tiny pieces of foam rubber). As special effects go, it was a doozy. And for Ms. Vahle, who typically plays straitlaced, well-behaved ladies, it allowed her to let loose with some truly gutsy acting.