by jbabel
There is a clause in the rulebook (pg 10) that states if a card's ability affects multiple players and the order matters resolve that ability for each affected player in clockwise order starting from the player who played the ability.Specifically you say
Player A-brainiac
B reveals -clayface
c-reveals -kick (or whatever)
A clayfaces brainiac, you finish resolving the 1st braniac (so play the kick).
Then trigger the clayfaced brainiac effect. Both clayface and the kick are back in players hands and could be reveal again.