He didn’t know what to do: he’d be sorry to hurt him! So he turned his lance back to front – the head facing back and the butt facing forward – and sat waiting for him, not moving an inch. Sir Kay spurred his horse to a furious charge, and gave Perceval such a blow on his tarnished shield that he smashed his lance right down to his fist. He almost felled knight and horse together as the clapped-out nag shuddered and buckled; but Perceval’s lance met Kay full in the chest and sent him flying from his stirrups and tumbling to the ground.

Gerbert's Continuation of Perceval