Dude, You're a handicap they don't sit on the head they Hump it, Then stay on it and Just keep humping it if you see the part before you get the airboat.
you, my friend, are sick in the head.
because they dont, and you are just a sick person.
And i HAVE seen it, they dont, i would have noticed being the fact i was watching them carefully so they didnt throw anything else at me.
You might have some kind of glitch that causes them to keep moving up and down but they dont.
And if they do move up and down, they are sucking blood, not humping..... They are like leaches, so they suck blood from their host