Apparently, a spooked caterpillar is one of the speediest creatures in nature. It'll simply roll up into a wheel and flick itself away. Interesting! And now a team from Tufts, with cash from DARPA, as made an unsettling robot that does the same thing.
The GoQBot is a soft-bodied silicone robot that's four inches long and has actuators made of shape-memory alloy coils. This allows it to have a push-off time of less than 250 milliseconds, which is a lot faster than your push-off time, to say the least.
DARPA is hoping to figure out how to use these guys to get in and out of dangerous battlefield situations much faster than any current bots. Looks like they're on their way!