Extreme Offroad Tracked Wheelchair the Original Ripchair 2.0

Its even got a rollcage for that extreme terrain you will be going over. Good luck getting your hospital to get you one of these to practice on. But I bet you wouldn't be depressed driving one of these.
http://www.youtube.com/watch?v=Qnrcr-rOcuw

ADDITIONAL PACKAGE OPTIONS: 

• Cup holder
• Hunting rifle mount
• Fishing rod holder 
• Custom cargo components
• Customizable controls, i.e., thumb controls (joystick), Lever Control (similar to a zero turn lawn mower)