Ouch. I feel for the owner. I wonder if they tried retracting and unretracting the gear etc to try to dislodge it. I got my bird caught on a branch once, and revving and unrevving the motors, eventually broke it free. Amazingly, despite one prop having an inch broken off each tip on the blades, it regained level flight before it crashed to the ground once it did break free. Probably fell about 4-6 feet before it had stabilised itself. These things are pretty impressive bits of machinery at times.