Here's this week's Deal of the Week. North-South already had 40 points below the line, so were looking for another 60 here.
NC sitting South opened 1♠ with his monster hand. West has an even better hand. My choice of bid would be a double, then bid Hearts later (showing a very strong hand). However, the modern style is to show your suit early, and that's what TB did with a simple overcall of 2♥. JW passed in the North hand and AP passed with the East hand (good Hearts, but too weak).
South then rebid his Spades with 2♠, West rebid his Hearts with 3♥, and now North showed some support with 3♠, enough for game for North-South. The spotlight was then on East. He's still got a very weak hand, but I think with that amount of support I would have risked 4♥. As it happens West bid 4♥ himself, and North looked at his two Aces and doubled.
South then had a tough decision, to leave in the double, or bid on himself and risk going down? He went for 4♠, which was an excellent decision with nothing much in defence (he's going to win one Spade trick at most in defence) but lots of offence.
4♠ was passed out, and West lead a Heart. NC ruffed, drew trumps and finessed Diamonds. Even though the finesse lost he came away with eleven tricks. If West instead leads a Club the defence get three tricks, but there's still no beating 4♠.
How would East-West have done in 4♥x? They certainly lose three Aces, and should also lose another Club too, for 4♥x-1. If the defence is too keen to take the ♣A then 4♥ could even make. So looks like NC made a profitable decision to bid on with 4♠.