Mr Fixit is exactly right.
I have had the same thing happen to me.
Float stuck and while trying to figure out what was going on the key was on so the electric fuel pump kept pushin gas for a few minutes and it all went into the cylinder with the intake valve open. It sat like that for a couple of days. couldn't turn over until I removed plugs but then i realized it could have seeped passed the rings into the crankcase. Sure enough when I changed the
oil there gas in it.