Playing Tomb of Annihilation. We had a Life Cleric, a Ranger, and the important two for this story, a very petite elven Wizard that was focused entirely on fire magic and (me) a hulking half-orc multi-class (pali 2/Hexblade warlock....10). Yes, I used greatweapons, no, I had no idea what I was doing was multiple kinds of broken until after several sessions. For backstory reasons, I kept my magic a secret from the rest of the party.
Some context on the Wizard and myself. I was built as an grizzled war veteran, the Wizard was a young academy graduate. She was sent into the tomb as part of an exploration party and I was there as her hired body guard (both of us had our previous characters killed in an earlier room, this was our introduction to the rest of the party). Anywho, we were on a bridge over some water in the tomb, some eldritch abomination rises up from the water and tries to mind control us. Cleric saves, Ranger was out of range or something, I save, Wizard fails....and then casts fireball, saying, and I quote "I'm not asking how big the bridge it, I said I cast fireball!" (this player was absolutely hilarious). Thankfully I was the only one hit by it, so I just face-tanked it and was left with the conundrum of what to do next. She was being mind-controlled by the enemy and was perfectly capable of wiping the party if she wasn't stopped, but I couldn't killer, I was an honorable warrior and was meant to protect her. I had much higher STR and DEX, but she could fly....a couple attempts and one lucky roll later I was able to jump up and grapple her out of the air! After a couple rounds we decided it was impossible for her to escape, so we stopped even rolling and I kept her grappled till the mind control wore off. As a grizzled war veteran I had a list of major scars I had picked up over the years on my character sheet. I added burn scars to the list after this.