Back in the late 90's, I stacked big time in Mallorca whilst descending on hairpin bends and my (then new) road bike* flew through the trees until it hit one leaving a tidy dent in the top tube. Back home in the UK my frame-builder drilled a tiny hole in the opposite side of the top tube, pushed the dent out, filled the hole and touched up the paint.

* Columbus Max tubing, ovalized, lugged BB and fillet brazed elsewhere. Lovely.