Yes. great question. It does but you can easily brace it with your hand on the back leg by adding pressure to it, which i always do anyway for added stability.
Here's a cool video I made, showing you guys how to achieve really cool shots without paying thousands of dollars for expensive glidetracks and sliders. Tell me what you think!
-Dan
http://www.youtube.com/watch?v=uwI1icr7JHc&feature=plcp
Nothing fancy, me and Chris just gettin back into riding and started filming a lil bit. Tell me what you guys think!! and SUBSCRIBE!
http://www.youtube.com/watch?v=ko-fJ9tiTxk&feature=plcp