Here's a hand from an online team match.
You hold ♠32 ♥KQJ9 ♦QJT8 ♣543. LHO dealer, we are NV vs V.
The bidding starts:
1♠ - pass - 2♠ - ...
Your turn, what do you bid? Most players will just pass, and right they are. At the table however I found a nice bid: 3♥! LHO bid 4♠ (as I expected) and that ended the auction.
Partner obviously lead a ♥ which gave declarer a very hard time. He took the Ace at trick 1 and played ♠ to my partner's Ace. He returned another ♥ and I cashed K and Q, seeing that the ♥ were splitting 3-3. Now, having 3 tricks already, I passively played ♠ and declarer had to find ♣Q without much information.
With any other lead (except ♠A followed by a ♥) declarer can easily discard a loser on his ♣ without losing control of the hand, so he can hardly make any mistake. Now he placed ♣Q with me and went down.
What would've happened in 3♥x? I guess I'd go down 1 too much, but how will they find that Double at this vulnerability with small trumps?