He does dart after the Harlequins once in a while, and though that rock isn't sharp really, I could see him doing damage to himself hitting the tallest point at his top speed. It's time for some driftwood.
He's still very active otherwise after the scare the other night, and I bought some more Stresscoat. I just hope he heals up now without any complications.
Wouldn't you like to beside the seaside?