Quite simply, get yourself a piece of string that’s long enough to go from your heel to the top of your head. Then fold that length of string in half. See if you can fit it around your middle… ‌ ...

1,1,1,2-Tetrafluoroethane. The aerosol powerhouse that sends the mixture flying is a relative of Freon-12, the ozone-depleting refrigerant that pressurized first-gen Silly String back in 1972.