Not Mk 108, Flak!
Real Mk 108 damage below.
Spitfire wing direct astern:
Spitfire rear fuselage:
Me 163 gun camera, not very good quality but representative:
Maybe not the same B-17 as gun cam, since wing is still intact, but it says attacked by Me 163.... Although you can see something on the wing, and is deceptively similar to the bomber above..