In response to the force's original credits; The "Stupid Force" is the Goldin force in card college and probably where a lot of people learned it. Created by Horace Goldin, presumably around the turn of the century 20th century. The pullback force is a Henry Christ force, earliest I could see it published is in The Jinx in 1940 under the "Stop When Ready" Force.
For the stupid force you can also force someone on your left and the cross your right hand under you left arm to offer them the card to add a little more convulution to sell it.
I first learnt the cull force in a Chris Ramsey video but he only had one card under the spread not a block which is less likely to be seen, he also asked them to say stop when he thumbed through the cards instead of getting the spectator to touch a card which is a nice alternative and stops the spectator trying to grab the card. I'd forgotten about the stupid force and the bevel force, which I think looked so much better face-down, and might be a better alternative than a slip-cut force. I've never been a big fan of the pull back force because it doesn't look natural to me as you have to cover the selected card. I've came up with a slight variation; if you get a break above the force card you can then do the add-on move when removing the face-up cards, this then feels like you have instantly removed all the face-up cards.
