Few Cloudy - Before anyone could intervene there was a loud bang and strong smell of explosive exhaust in the cockpit. The hatch, which had, as it transpired, not been designed to blow with a pressurised cabin, stayed on. The aircraft did not depressurise.
Having got the by now white faced Radar back to his position and examined the damage (jacks partially torn from the structure - torque mechanism hadn't budged) the Captain returned to his seat.
Was there some sort of interlock to stop the seat firing if the canopy hadn't departed?