no.. not in the combustion chamber .. well.. hopefully not.
Fuel enters through a hole in the side of the cylinder on a piston-ported intake. The piston, as it moves up and down, opens and closes this intake hole. The renegade slide-pin would need to get past the quickly moving piston. When it does it, it ends up below the piston, inside the crankcase.
If the pin got past the piston and into the crankcase and was chopped into little pieces, the pieces might get blown upwards and into the combustion chamber through the transfer ports.. this is the normal fuel pathway and might carry the small, broken pieces.
Another system is a reed intake. Here, fuel (and the pin) would enter the crankcase directly. The piston's movement does not "time" the intake pulses.. a reed valve does it instead.
dont be a freakin coward! open it up.. :)