i've had 2 mid airs, one a couple of years back when my Outlaw delta hit a Ganster head on at a closing speed of 180 MPH, i burried my wing tip in his wing only his wire UC save his wing being severed totaly, i also took his firewall out and the tail on the way through. when we both landed safe, i took the tip out of his wing, and glued it back on.
second was two weeks ago, me and a friend are prophanging close together, hes still a bit new to it and fell out right into me cutting through the rudder and elevator servos. he fired up and flew again. i spent 3 hours fixing the damage that night and it's fine.

unless one of the guys is doing something totaly stupid, mid airs are a $h*t happens event. you can also choose not to fly with some pilots that seem to fly in a very ramdom way