Here's a few:
James kept hitting his head on the camera in the panamera race episode. S13E04.
James hit Jeremy in the "plums" in the cheap supercar challenge. S07E04.
Richard was in pain from riding the Vincent black shadow. S13E01.
Richard hurt his hand with the pick axe in the Bolivia special when he was trying to fix his starter motor on the raft.
Jeremy got hit in the nads by a paintball in the automotive art gallery challenge. S14E05.
James kept hitting his head on the camera in the panamera race episode. S13E04.
James hit Jeremy in the "plums" in the cheap supercar challenge. S07E04.
Richard was in pain from riding the Vincent black shadow. S13E01.
Richard hurt his hand with the pick axe in the Bolivia special when he was trying to fix his starter motor on the raft.
Jeremy got hit in the nads by a paintball in the automotive art gallery challenge. S14E05.