Hydrogen is liquid at ~-420F. Even if it is only presurized in the tank, a puncture allows the gas to expand. Expansion = Cooling. Check out how a CO2 fire extinguiser works.
Liquid H2 can cause organic items to crystalize.
This was done with liquid Nitrogen which is ~-200F
Also H2 has very low ignition energy. so after the thief has had his hand crytalized, his cigarette ignites your car into a flaming ball of srapnel