Were you mysteriously stranded along Metro Line 2 this morning? Well, the mystery has been solved. Shanghai Daily reports that a thief climbed on to the roof of a metro train and delayed service for 40 minutes at 8:45 this morning. The man stole a wallet at Lujiazui station, got off the train, and instead of making for the exit, cleverly ran for the tunnel and clambered onto the roof of the train. Perhaps he was trying to be inconspicuous, or maybe he was rehearsing for a role in a Speed remake. Either way, the police were called, and the thief was arrested and taken away uninjured. Meanwhile thousands of people were left stranded all along line 2. Normal service resumed at 9:30am.