Mr. Monk Goes to the Bank - S6-E12
Factual error: Banks never use combination locks. A four-digit lock, like the one used here, would take a patient thief about six hours to open by trying every possible combination, and banks really do take such unlikely scenarios into account. The wall panel in the bank would be secured by two padlocks, with no one person holding both keys.
Mr. Monk Goes to the Bank - S6-E12
Factual error: An intelligent, experienced police officer like Stottlemeyer would know perfectly well that shooting a lock will not open it – that's purely a Hollywood myth. Not only would shooting the lock probably jam it, but the ricochet in a closed room like a bank safe could easily kill someone.
Mr. Monk Goes to the Bank - S6-E12
Continuity mistake: One of the large safety deposit box doors is standing wide open when Monk is curled up in the vault's corner. But when the camera angle changes, the door has closed itself. (00:30:45)
Mr. Monk Goes to the Bank - S6-E12
Continuity mistake: The living statue street performer holds a water bottle in his left hand while Randy questions him. When his alarm goes off and the shot cuts, the bottle jumps to his right hand. (00:08:15)
Mr. Monk Goes to the Bank - S6-E12
Continuity mistake: When Monk is trying to convince the old woman to use the other pen so the ink in them will be even, in the shots from behind him, the pen's chain is hanging down below the counter. In the shots from in front of him, the chain is pulled taught. (00:23:45 - 00:24:15)
Answer: Notice also that in the opening credits scene when he is touching parking meters her also wipes his hand on his clothes each time he does it.