Is there an old man in John's crib?

I swear an old man climbs into John's crib at night because there is no way he can fart that loud. Last night, I was sound asleep and was suddenly woken by a loud noise. I heard Jamie start laughing and realized it was John farting. We both started laughing so hard we shook the bed. I think he takes after his dad, but Jamie blames it on his Grandpa!