ive had it happen on two motors, just didnt bend a rod cause i caught it early. If the motor feels weird or tougher than usual when kicking it over, stop and investigate. You should be able to pull the plugs out, KILL the ignition completely, and kick it over a bunch of times to kick out the fuel thru the plug holes. It is important to kill the ignition completely as the plug wire spark can ignite the fuel spewing out and cause a fire. This happened to me and was a disaster.