00:13:13.914] Tank Avenger's Shield Majordomo Staghelm *41249*
[00:13:14.180] Tank Seal of Truth Majordomo Staghelm 1176
[00:13:14.180] Tank Seal of Truth Majordomo Staghelm 1121
[00:13:14.198] Spirit of the Flame hits Tank 33170 (B: 14903)
[00:13:14.322] Spirit of the Flame crits Tank *87942*
[00:13:14.436] Healer Lifebloom Tank +2233
[00:13:14.436] Healer Lifebloom Tank +*29798* (O: 18055)
[00:13:14.436] Healer2 Lifebloom Tank +0 (O: 2002)
[00:13:14.486] Majordomo Staghelm crits Tank *101771*
there were a total of three crits scored against the tank on the pull, none on any other pull inabilities the instance. The only explanation which made any sense is that somehow the tank got caught into a sit animation, but one of the three crits was far earlier in the fight before a phase change where certain abilities of domo cause a momentary loss of control.
There were no buffs present on domo or the spirits which specify an increased crit chance.