1) Before every cleaning he asks you to remove your pants.

2) He repeatedly asks you, "Is it safe?"

3) He uses gummy bears and super glue to fill cavities.

4) His office is in the back of a van that says Pablo's Cleaning Supplies on the side of it.

5) He tells you that he takes cash, credit, and crack cocaine.

6) When he uses the suction tool he has one hand in his pants.

7) His business card says that all root canals end with a "happy ending."