Yes, Hartmann (and lots of the other high ranking German aces) were shot down / bailed out multiple times during the war.
Hartmann said his secret was never get greedy. Swoop in for a single easy kill and get away. Wash, rinse, repeat for years. Flying multiple missions per day, it adds up (and yes, he got multiple kills on missions but it wasn't his normal MO).
And let's remember the line between HERO and ZERO is mighty thin... as evidenced by the USAF F-15C shootdown of 2 x UH60 US Army Blackhawks in the Northern No Fly zone and other, less well known "ah FUCK" incidents.