Found MavicPilots because I needed somebody to repair my Mavic. Took a tree out today, or should I say it took me out. Flying a Litchi waypoint mission on Tiger Stadium Princeton Univ, recon for my Inspire 1 flight, and forgot that altitude is relative to takeoff, not terrain. Not use to this. Also forgot that collision avoidance was off while flying the mission. By the time I flipped the switch to sport mode and yanked back on the stick it was too late. It turned into a rescue mission instead of a recon mission.