Bidding procedure. Change of Call.
North/South are bidding in Spades, South bids 4-NT (Blackwood), North replies 5-D, East passes, South bids 5-NT, West passes and before North and East can call South picks up his bidding cards and replaces them in the box. TD (I) was called. South said that he thought he had bid 5-S (which he thought would end the auction), and after West's pass thought everybody had passed so he picked up his bid cards and put them back in the box!
I ruled that by picking up his cards he had prevented his partner from bidding and also forfeited his right to change his inadvertent bid. South should play in 5-NT.
Do you folks agree with my ruling?