CHICAGO—After witnessing a fatal hit-and-run accident Tuesday, Chicago police officers Ed Malloy and Ron Garrity attempted to replicate the sound of a man being hit by a taxi. "First, there was the aiiigh, then a fa-wumpp ba-bumpp," Malloy said, stifling laughter. "Then, when he was bleeding from his mouth, he kind of went ggrrgg blibb-blibb." Garrity disagreed, saying the impact "sounded more like a tha-loomp poompf." Malloy said it was the funniest on-the-job incident since that junkie was stabbed in the ass.