Got my first, and so far only, pentakill with Swain. Relatively late in the game, other team killed two of us and went to Baron. I was all set to just defend until our other two were up, but my two remaining teammates decided to go all in and went to interrupt them.
Was positive we were about to hand them the game, but I went in with them and we fought like soldiers, had a bit of help from the Baron and managed to be the last man standing in the end. PENTAKILL.