

I don’t go to subway frequently, maybe once a year or so, but if you ask nicely and show them a video they can usually pull it off.
It’s the only way to cut for sauce-heavy sandwiches that would otherwise squish out the side.
I’ve been eating the same sub for over 30 years now. I tried the side cut on it once, and managed to get hot tomato sauce all over myself.





They’re a type of heat engine using evaporation.
Technically it would work, but it wouldn’t scale up nicely no.
It would be far less efficient than everything we currently use for power.