That is kind of a beast: the part they're excited about test firing - which generates 31,000lb of thrust - is just the motor for the fuel pump for the main engine!
I know! I am a twelve year old boy again; had a great morning reading up on this.
(There is a downside to being a child again: I have a strong urge to cheapen this by saying something like, "That's almost enough to lift your momma off the couch.")
