Declarer plays ♦A everyone follows, then ♦K, East plays the queen thinking ♦K is a low one.
It can be argued that the reason why east got distracted is mainly because another played, who happens to be declarer's team mate from the closed room, has an ongoing yellin argument (for 2 minutes already) where he is asking tournament director to go outside for a punch fight. To the poojnt where it is really hard for dummy (let alone East, who is very old) to even hear what cards partner is asking him to play.
Is there any law where something can be claimed here?