for stuff to make it into differant cylinders is very posible. ive seen it first hand.
firstly, rear turbine wheel fell of, most of it went out the back but alot went back up the ex manifold and destroyed to bores on 4,5,6. also made it into 1,2,3 but not as bad. it was smashed into the head on all cylinders.
second, at my old work we had out ipra civic drop a ex valve on no,4 that broken exhaust valve ended up in the inlet port of no,1. lol.. motor was a throw away..