A napping soldier is abruptly woken up when someone throws a wooden beam onto the floor next to him and it crashes loudly. Prank / practical joke. Good reaction.
Woman riding sled in snow runs into tree. Head makes good sound effect.
Man on skis being pulled by a snowmobile lets go of rope and crashes.
Two women face each other on facing four wheeler trucks outdoors when they each step on the gas and one of them rolls upward, tilting over her four-wheeler as she falls in the mud.
2 boys on a 3 wheel ATV motorbike run over Dad with camera
Kid on bike runs into brick wall