Shin guards! And tape the battery compartment shut!
*
*some guy at the event a couple years ago jumped over the little wall along the side of the track, and the battery compartment cover fell open on his tx, spilling the batts. Trouble is, his 3 engineed nitro dragster turned into a runaway and wiped out into a seating area, took three guys to shut it down (one per engine)! Epic....