my lil 6.1 died at the 1000ft mark at the track

pulled the remaining Pistons and saw that the rod of cyl 2 is bend. No visible damages from impacts or similar. Piston top is ok and has no valve markings. Strange. Guess it got it ignition on the way up to TDC while the crank stopped reving for a nano second during the Situation on cyl 3 & 4...