From the Falmouth Police Department (verbatim):
Man injured using canned air for toothache. Officers were dispatched to assist Falmouth Fire & Rescue personnel with a male possibly “huffing” canned air. However, it was determined the 61-year-old was using the canned air to numb a painful tooth and injured his mouth in the process. As a result, Falmouth Fire/Rescue transported him to Falmouth Hospital for further treatment.