Ideas for FW arena hazards
1/ A pit sweeper It's just a steel blade that follows an arch if you don't get out of the way you get swept in the pit! easy to operate either with an electric motor or pneumatics.
2/ Dukes of hazard speed ramp see how far these fast robots can jump
3/ chuck in a big ball and some goal posts
4/ Poop-ah scoop-a, A lifting device that if a robot gets pushed on to it will gently scoop them out of the arena and on to a mat
All with lots of lights and sirens