Being in the flag alone with 5+ attackers in siege for 30seconds or more tanking with my shield and taking some attackers with me and not a single ally showing to help, and finally dying from their constant attack and still losing the round. Or even worse, a teammate coming, teamkilling me and then dying.
In battle, one of the most adrenaline pumping moments that I would consider to be both in my best and worst moments lists is once finding myself in a very bad position. I was alone and was trying to backstab some archers (agi shielder build) when suddenly one saw me. Immediately, I find myself alone vs 5+ ranged who started making a semicircle around me. I started dancing and managed to take a few of them before my shield broke. I then ran away, and found another shield, but got shot while equipping it, which meant my death.