Stand on a skate board and throw a balloon, and then throw a medicine ball. Both items are the same size so they will interact with air the same, yet you only move when you throw the medicine ball. This proves that interaction with air is not responsible for the skateboard's movement.
What I can't believe is how a supposed person like you who appears to know it all can come out with something as silly as this.
The medicine ball displaces more atmosphere than the balloon.
What shocks me is the fact that you know this but refuse to marry it up because it kills off your rocketry for starters.
Why don't you just look at water displacement and that's all you need to know about the atmospheric reaction upon the medicine ball and balloon on your dense body on your skateboard.
Drop a medicine ball in a tank of water and it will displace it's own density/mass of water. Do the same with a balloon on the water and it will do likewise. Basically the balloon will displace so little as to it being negligible as it would be a drop against a bucket full with the medicine ball.
This is what's happening with the atmosphere when the ball and balloon are thrown into it from your skateboard. You move back a little more with the medicine ball because it displaces that much more atmosphere quickly which means that the same atmosphere is pushing back onto the ball as a resistant force. It's a reaction against your action.
The problem is, it's not looked upon like this because if it was, it kills the fantasy of space and many other bullshit supposed scientific truth's.
Here is another simple one: take a bottle rocket, fill it roughly 2/3 full of water, and launch it. Note how high it goes. Now launch the same rocket but with no water, and note how it doesn't go as high.
This is another classic con that baffles people.
If people actually used their common sense, they would see the con for what it is. It only takes some logical thought.
The reason why a water bottle rocket works better is because the water is more dense than the atmosphere, aided by compressed atmosphere inside the bottle.
All that the compressed air can do inside that bottle is to EXPAND against the water and the bottle itself. The sides and upright.
One the neck of the bottle is opened, everything inside that bottle is still doing the very same thing it was doing when the bottle was closed. The only difference is the air molecules are now being allowed to expand a little more due to the bottle having an outlet.
The fact that the compressed air inside is pushing against the water and the bottle, it creates no work inside the bottle. The work is created as the water is expelled from the bottle due to it being more dense than the atmosphere under it , plus being ejected under more pressure.
Once this water hit's the atmosphere it does what the medicine ball does. It creates a dense force against that atmosphere, but like anything. If you keep pushing something at speed into something else, it's inevitable that there will a build up of pressure. A compression. Which is what happens with the atmosphere as the water pushes through it. It compresses and squeezes back against that water and sends the bottle into the air.
I tried to explain this by using the world war Z video where they try to scale the wall but it got lost on the tefal head.
Basically with that world war Z wall footage, if people took notice, you would take an analogy as the zombies being the fuel of the rocket and the ground being the resistance/atmosphere.
For people to scale the wall...or to make the analogy....for the rocket to move vertically, you have to keep pushing against a resistance by using more power and numbers.
Now just like those zombies clambering over each other and spreading out very wide, it created the lift to get them over that high wall, because it's fuel on fuel against atmosphere/resistance.
As long as that floor holds and there's zombies pushing on each other against that ground, they will continue to scale the wall.
If that ground gives way, they all come tumbling down. Let's call this, your space or vacuum or even thin air. All of which mean there is no resistance to the fuel/zombies and no resistance means?....no work down. No ground gained. No vertical flight. No lift. No nothing.
Like an eagle in the sky looking for it's next kill, this will soar way above the tefal people's heads.
I just hope (apart from the obvious logical people, you know who you are) that those who are looking in, can see the truth of what I'm saying.