DARPA: Hey there! That's a pretty nifty marble shooter!
You: Uh, thanks.
DARPA: Here have some money.
You: Cool!

Two Weeks Later:
DARPA: Say about that marble shooter, do you think you could set that up so that instead of marbles it shoots 1/2" steel ball bearings and up the velocity to 1800 m/s and a rate of 700 bearings per minute?
You: Umm hmm.

One thing is for certain: there is no stopping them; DARPA will soon be here. And I for one welcome our new military overlords. I’d like to remind them that as a trusted geek, I can be helpful in rounding up others to toil in their hackerspaces.

The "drive system to the main blade" looks flimsy because there is no "drive system to the main blade." Autogyro

Citation needed

I affixed high-efficiency monocrystalline silicon PV cells to the aluminum cans and used pizza boxes strewn about in my yard and now my trash is generating electricity! Electricity from trash, wow!

So rather than using the tools of evolution, the students of Tennessee would learn to pray to god for a new vaccine?

The next big thing will no doubt be the Petatron Plasma Wakefield Accelerator. Where will it be built? Who knows, but it probably be small enough to fit inside a large industrial building. Or likely an adjunct to an existing collider.

...I've always wanted to interact with the credits of "3rd Rock From the Sun".

Not so fast. The orientation of the vehicle depends on the orientation of the magnetic field and the orientation of the magnetic field is easy to set within the track. Can't say this is a fake or not but I think the physics is sound.