Also, I have personally experienced a high mileage car with a sloppy chain skip a tooth under sever and abrupt braking. The inertia of the internal engine components want to keep going and the crank stops. Check cam timing. This could be what occured.

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64 European Coupe Brilliant Silver with Red interior 4 Speed Sunroof
87 TDT 286k
87 SDL 195k
83 SD 202k
83 SD 201k
83 D 286k
02 R1150RT 32K
00 122HP FLSTF
07 KTM 250SX

"Danger takes many forms"