Longboard Anti-Pumping

I've learned longboard pumping, which is a way of propelling a skateboard on the flat or slightly uphill without touching your feet to the ground. Now that I've gotten pretty good at it, I've been trying to learn to anti-pump. It seems logical that if the pumping motion can speed you up, doing the opposite motion could slow you down. (I don't mean sliding on purpose to slow down, which also works but is a whole different thing.) The anti-pump does work, and you can noticeably slow down while going down a hill, but it feels like a very unnatural silly motion, even more than the regular pumping motion does. It almost makes me laugh every time I do it. Maybe with more practice it will feel normal.