Best shots for me were always on Planetside, well the funniest shots/combat experiences anyway.
1) On a Vent server I was a TR player in a mossie just buzzing around not really doing anything and in the course of chatting to a friend discovered he was playing as VS that day for a bit of fun, later on in the conversation it came to light that he was roughly in the same area as me.
Well I went looking for him and I happened across a tower from which some VS guys were spawning and running cross land to the nearby large base which they were assaulting. And at a distance with my optical zoom and that other implant that lets you see detailed info about the enemy I was able to spot my friend amongst the half dozen or so other soldiers around him.
So I punch the aircraft to max, line up on him, all the while he is oblivious to my presence way above/side of him. As I close in I hit the afterburner and accelerate to max speed coming in low. I manage to hit him

the ship stops dead for a split second, I take a lot of damage but survive and suddenly carry on, pulling up and banking I see his corpse then all of a sudden him screaming on vent WTF WTF! WTF! I was in tears, it was quite simply the funniest thing I have ever experience in a game. Simply squashing him with my aircraft
2) I used to be our outfits Deliverer driver in Planetside, back before SOE destroyed the only game of its kind, and before the physics nerf. Back then it took skill and luck to drive full speed over open terrain, not following the death trap that were some of the roads/paths. Anyway we had a deliverer, which is like a 4X4 armored car, it was relatively fast, and quite light. Burning across open terrain miles from any base to get to a combat zone we were looking forwards to getting stuck into the enemy. Anyway, like I said it took skill and luck to drive this thing, neither of which I had that day. Came to a slightly bumpy section of terrain, nothing too bad but must have hit it wrong. I suddenly found myself barrel rolling off a small rise in this armored transport, OK we're screwed I thought as it landed on its roof and promptly exploded killing everyone inside, proceeded by the ominous silence on vent after something stupid/unexpected has happened.
3) Attacking a hostile base, we had pretty much taken the courtyard and walls so it was just a precession after that, but I was slowly walking into the main entrance with my implants on when I spotted a shimmer on the wall which everyone knows in Planetside is a cloaky, and it looked like he wanted me dead, he dropped down and I pretended to have not seen him. So closer he came, and when they move you can see them which is handy, kind of like the predators cloak. I open my inventory, and equip an EMP grenade and throw it at this guy, who happens to be standing in his own minefield

The EMP grenade detonates all the mines and this cloaky fellow as well

Was incredibly funny.
There were so many good times in Planetside, it was the most fun I've had in an online game, shame they ruined it. I mean it was always fun accidentally running over cloaked enemies in your buggy without you knowing. Or dropping vehicles onto enemy players squashing them etc.