In the 80s, when I ran a Respiratory Therapy dept. in a Phila. hospital, local kids snuck into the cage that surrounded our big liquid oxygen receiver and “H” cylinders of nitrous oxide ( >85 lbs each). They somehow got a nitrous tank over the 12-foot barbed-wire fence and took it to the local park. Lots of giggles in one of those cylinders.

A kid whose dad sold supplies for these cylinders shows up with a regulator and a mask. They passed the mask around and laughed hysterically- until one kid used the strap to hold the mask on his face. Breathing pure N2O killed him in around 5 minutes. That’s what the other kids told the cops.

N2O in large quantities can easily kill you. “Whip-its” from a can of whipped cream aren’t so dangerous.

My bet on the state where the sign is posted is California. No doubt, they first concluded that canned whipped cream causes cancer (like everything else). Then they decided that a little induced laughing is not allowable, so they restricted the sale of Ready Whip to adults. They probably even banned the movie, “Little Shop Of Horrors”.