Originally posted by Tevirik:

To rebind, I had to use a mod.
I can't get block+jump+space simultaneously. (I need too many time to get my fingers on the right buttons and I'm dead before I can fire this silly combo correctly).

You're conflating a 2 button action into a 3 button action, which its not.
It's simp!y holding/pressing the right mouse button and pressing space bar.