In the last fifteen years I have witnessed three midairs. One was the most devastating I ever seen. A sixty size Dirty Birdy flown by a friend of mine went nose to nose with a sixty size P-51 during an airshow. We never did find all the servos or one of the engines. The planes were completely destroyed. Parts rained down for a good five minutes.

Another was a royal p-51 hit a small electric plane. the p-51 managed to safely land with part of the wing covering of the electric still on the wing.

The funniest one was two guys flying electrics one was flying a slow stick and the other a small balsa plane of some type. Now these two were trying to hit each other. The balsa one finally hit the slow stick with its landing gear in the wing the wire cut into the soft foam wing and the two planes were stuck together. The two planes spun to the ground upright and hit softly. They separated the two planes and the owner of the slow stick put some tape over the gouge in the wing and they changed batteries and went at it again. Laughing hysterically.