Fill your car tires with water pressure from the garden hose (really)

[ho'ard]

I can imagine the extra mass in the tires causing them to fly apart at speed from centripetal acceleration.

Dunno, seems like then there would be law suits out the wazoo about that aerosol flat fix gunk.  A tire full of water might affect braking/stopping distance though, maybe. But maybe stay cooler.... or warmer....