In Battlefield 2142.
It was a Titan match, and we were infiltrating their Titan(giant airship for those who don't know). Time was running out, and they were about to destroy our Titan. Not from the inside like we were doing, but by controlling the missile silo's on the ground. Well time was running out, our Titan's health was low, and we just got into the core. We charged in, I was in front with 2 squads at my back. We cleared the room, unloaded on the core, fought off attack after attack, and eventually destroyed it. But it wasn't over yet, we had to escape the thing before it exploded. So we broke out, but there were quite a bit of enemies in our way, also trying to escape. They turned around and started shooting at us. Got most of us as well, I managed to get through them while taking out a few people, but it was just me and 2 others. We ran out to the back of the Titan, and jumped off. We opened our parachutes and glided safely to the ground, just in time to look up and watch the Titan explode.
It was glorious, and definitely an "oh, HELL YEAH!" moment.