Nakamura's Puzzle Rush Magic

Here's Nakamura playing puzzle rush. The first example is in "survival mode", that is, untimed mode.

https://www.youtube.com/watch?v=NMdp-8sWUWs

Here's another, where he goes for +50 in 3 minute PR:

Watch at 2:08:12

https://www.youtube.com/watch?v=YMVMmo00TuM