Zuckerberg:

- 5'7" and reportedly 155 lbs.

- 39 years old.

- One of the stronger nerds you will meet.

- Built like a tech geek who wants to be a UFC fighter.

- Jiu-Jitsu blue belt.

Musk:

- 6’2” and reportedly 187 lbs.

- 51 years old.

- One of the brightest white torsos you will see.

- Built like a crash-test dummy.

- Trained in judo, kyokushin karate and taekwondo as a child, recently trained briefly in Brazilian jiu-jitsu.