What is the strangest damage to an aircraft that you have ever seen?

I once did an emergency extract of a Recon team in VN, There was no place to land so I backed the aircraft into a hillside and let down until I felt solid enough for the team to jump on the ramp. During the loading process, I was mentally congratulating myself on the stability of the hover. When the team was all aboard, I lifted and returned them to their base. On the post flight inspection, we found an 18 inch hole in the underside of the aircraft where a tree trunk had punched through during the landing. Gave some extra stability in the hover and the metal shop had a good time with it.

SSgt (Join to see), the B-17 "All American" sustained some of the most significant damage that I've seen to an aircraft, yet was able to continue flying and return to base. Occurred in 1943. I've attached a link to the story.

http://www.warbirdsnews.com/warbird-articles/wwiis-b-17-all-american-separating-fact-fiction.html

Being a "tin Bender" for 24 years I have seen all kinds of damage. When I was a reservist at Wright- Pat in the early 90s a F-4 hit two deer. When stationed at Davis-Monthan we had a A-10 strike and kill a coyote. When stationed at Travis I have had not bird strikes but Pterodactyl strikes on C-141s and C-5s. When you investigate the "possible bird strike" and you see the talon still wedged between the pylon and wing and the talon is bigger than your hand, all you can do is just stand back and say "damn!" As for extensive damage we discovered extensive corrosion on a C-141 were 40 square feet of skin had to be replaced as well as the stringers and ribs. One of the dumbest things we had to fix on our "off time" was when a F-86 pilot practicing for an airshow bloody forgot to put his landing gear down and decided it would be really cool to belly land a perfectly good aircraft. Lucky for the aircraft owner my sheetmetal guys were dying to get their hands on his aircraft and fix it for gratis. Many more stories are out there!!!!!!!