They could do years on Sci Fi tech, bringing down to what’s real, what’s possible. Didn’t they do a light saber at one point?

I’m watching the series Salvation and it is full of “advanced tech” that resembles reality somewhat. Imagine Mythbusters building the biggest rail gun they can, demonstrating both its potential and how it fails, and maybe even do a tour of military rail gun prototypes, then concluding with how much more the one in the show would have to be, and all the places it just wouldn’t work