Impressive but too much fuel required to do that from orbit.
Do what from orbit? It's a first stage it will never make it to orbit.
It also is looking to come to zero velocity, good old friction can do most of the work. Depending on the flight profile chosen it may only be necessary to fire the engines for a few seconds to go from terminal velocity to zero.
Since the company doing this is now supplying the space station they might know a bit more about rockets than you.