What Does This Button Do..?

An airplane passenger "found himself hurtling out of the cockpit, smashing through the Perspex canopy and into space after grabbing the black- and yellow-striped handle between his legs. He had inadvertently pulled the eject lever and found himself blasted 100 metres into the sky on his rocket-powered seat."

As one observer said: "What a trip. That guy took off in an Astra, came down in a parachute, and landed back at base in a helicopter. Not bad for a for a single flip.""

The passenger survived 'with barely a scratch' and, I'd assume, one hell of a pant-load.