I only have two issues with the demo.
-The grapple line is way to weak, it breaks sometimes when you teather a body to a moving car.
-Anything can go through the grapple line, don't you wish you could built sometype of tripwire and make the motorcycle dudes fly off their vehicle?
Try and get the car as it's passing. I was only able to do it once, and the guy stopped driving cause he freaked out, but if the car's moving away from you, that might cause the break.
And yeah, that would be really cool, but can you hook a wall to a wall?