User blog comment:Aftenshnoshnikr/Attack On Titan's Tribute Game/@comment-92.19.55.196-20140627172315/@comment-11227880-20140717075605

I find it useful if you don't, because then you have a spare hook to latch onto a surface nearby so that you can make a quick getaway incase you are in the path of a titan's attack.

otherwise if you are referring to the spacebar, I never really use it