My Stage 8 AFF (hop n pop is Stage 9 in Oz) was also my 1st jump from an Islander. I hit the undercarriage (near the door on an Islander) on exit, sending me unstabe.
I thought I would do a nice easy practice exit from height before doing my "scary" stage 9, so manifested for a solo.
Unfortunately, when the plane got to 3,000 ft there was an engine failure and the pilot ordered "everyone out" .... so I got my hop n pop anyway! (the person behind me said I only just missed the undercarriage again).
Not too exciting (Islanders are twin engine), but exciting enough for me at the time .... and I didnt have to pay for my slot for my last AFF jump.