1. You hit him with a bicycle pump?

2. 14 Math Paul : This bicycle pump is useful for the public and hard to vandalise.

3. So make yourself heard above the din with the Biologic Blast airhorn, a safety airhorn that operates on compressed air that can be refilled with any regular bicycle pump.

4. The bottle is then pressurized with a gas, usually air compressed from a bicycle pump, air compressor, or cylinder up to 125 psi, but sometimes CO2 or nitrogen from a cylinder.