Harry Einstein's Italian Bell

Origin
Harry Einstein (1904 - 1958) was an American stand up comedian who specialized in dark comedies. For the most part Einstein was a master roaster, part of his act was ringing a call bell to let other presenters know they were messing up earning a laugh from everyone. While preforming as roastmaster for the roasts of Lucille Ball and Desi Arnaz one of the other comedians sitting at the tables rang the bell and Einstein suffered a heart attack. Unfortunately the audience thought it was an act especially when one of the comedians asked if there was a doctor in the house.

Effects
Anyone hearing the bell ring out will start to laugh uncontrollably, giggles at first the laughter then rolling on the floor crying. The laughter doesn't stop though, it continues until those effected go into cardiac arrest.