Hey Guys and Gals, my buddy managed to ding his CAAD8 R1000 Cannondale top tube pretty well. Its about a third of the way back from the head tube on top. (pics below) Has anyone ever had luck pulling a dent? I know you can do it with automobiles with a suction cup type thing. Would that work here?

Also, should he be worried safety-wise? I know caad8 is pretty thin, but this doesn't seem all too bad. He has ridden it like this for a short while with no ill effect so far.

Thanks alot in advance!