Overpressures
Way back in the mid 50s three TPs, including Geof Fletcher and Peter Baker, flight tested Comet 2Cs out of Boscombe Down. With some trepidation I sat in one with engines running and a 'doctored' cabin discharge valve until we reached a limiting overpressure of 9 psi. Was not conscious of any effects on myself.
Then there was the occasion that I had a VIP as passenger in a RAAF Mk 20 Canberra. Didn't notice that the VIP had hung his jacket over the cabin discharge valve in the rear bulkhead. Missed scanning the cabin pressure in time before the door seal blew. Jacket was undamaged. Overpressure unknown.
Lesson leaned - the body cannot reliably sense an overpressure that may be enough to burst the cabin. Does your aircraft have any overpressure warning?