Nothing spectacular here , but my partner and I reached a nice slam in a Swiss match on these (approximate) cards:
After the storng 2♣ and nebulous 2♦ waiting (0+, but lacking positive slam values with a good five card suit), East's raise promised support and at least one slam control. 4♣ and 4♦ showed controls. At that point West judged that slam needed one more trick from partner; 4♥ elicited a second control bid and slam was excellent. This ought to have carried the event but East fell from grace with a phantom sacrifice on the next hand. Don't sac at IMPs :)
Plus... it's free!