A little after 8 p.m. on Tuesday night, the 71 Haight-Noriega (of course, it had to be the notoriously dodgy 71), crashed into a moving car at Market and Jones streets. Both vehicles were traveling east on Market before they smashed into each other. According to Muni spokeswoman Kristen Holland, "[p]reliminary reports indicate seven people were taken to the hospital and 23 others were treated at the scene for injuries sustained in the crash." None of the injuries were life-threatening. Why did the two hunks of steel ram into each other? Who's to say. This is Muni, a mystery wrapped questions rolled into a transfer. But the Muni driver in yesterday's crash has been placed on "non-driving status" until his pee tests positive or negative for substance abuse.