Gangplank Conspirscy
Recently, it has been revealed that fresh produce, especially, oranges and lemons, can help with hangovers. Now, when drunk people get into an accident, they don't get as hurt due to their limbs being 100% relaxed. So, maybe, when mf blew up the ship, gp was drunk due to the occasion of capturing tf and graves, so when the explosion came, he didn't get as hurt. Then, he proceeded to munch on his oranges till he could pick himself up and went to the healer.