Both, for his safety if he falls and to keep him on the bike. Also mas a harness. Seat pivots so he can corner, seat also has a shock done by avalanche because he can't stand so this takes the impact instead of his back.

 got to love Avalanche!!! Craigs the man!! way to go thats sick, good for him getting back on the bike!

 funny i was hanging out with doug today at central village! the single best guy on earth

 roll cage on the bike for his safety or to keep him on the bike, explain please?

 Mad props. You can't ever stop doing what u love.

 Way to go Doug, keep riding.

 big respect dude