[ozzy6009]

>The problem with hydrogen as fuel storage (mainly for space travel) is the pressure, operating a fuel tank at 400 gPA or higher is going to be tricky

Operating a fuel tank at 1 MPa is tricky. Operating a fuel tank at 400 GPa is ludicrous.

[Avernar]

So that's how Spaceball 1 could reach ludicrous speed. You learn something new every day...