I recall seeing a US Navy film from the 50s showing "Dilbert Dunker", a side-by-side cockpit frame with seats. It sat atop a set of rails, about 10' above the edge of the pool. On "go" it slid down the rails and hit the water headfirst with quite an impact, and then rolled over the nose to inverted.
I suppose in those days there was no Occupational Health and Safety Act, and as a result it was fairly realistic.
I hope the Tiger sim gets some doors (jammable) and seat belts (jammable) and they wear blackout goggles for the night ops and murky water.