Incendiary kill with a mine I dropped ages ago was a fun one. Would not have even known it was my kill if I hadn't gotten the notch on the achieve for it.
speaking of mines.
I needed junker hull destroys.
Only junker in the match was the munker I was on.
I mined ourselves (well more like the cap thought he could fly like a goldfish in a mine field) and got a notch when he rammed my mine.
Suffice to say I tried to replicate it, but failed. He learned his lesson after the first time and finally stood still so we could actually set up a proper mine field.
Also in regards to that. If that were truly the case with the last player/ship gun hit counting towards the kill... I killed plenty of ppl with poons and even had a spire crash while it was pooned. I did not get a notch off white whaler. I only recently got the white whaler notch (the last one) via ramming the HP to nothing and letting the flamer do the rest.
If poon was coded to be the way you mentioned. White whaler would not be the nightmare it is known to be. So I guess this exploit is weapon specific? I've certain found it working on a flamer.
And further on with flamer? I needed (still do-so might do further tests), destroy parts while pooned. I dunno if it was the lag. But I got notches from that long after the poon had worn off. So I assume the fire destroyed the part, but the part was hit during a poon so it counted towards the achievement.