Tahm Kench and Diana bug.
So this bug has occurred to me twice in hundreds of attempts, blind luck really. While on Diana, and with 3 stacks of Tahm's passive on, I use Dianas AoE pull, pulling in 3 enemies. Literally exactly the same time as i start the pull, Tahm ate me, and pulled all FOUR of us into his mouth. Working on a video now.