Dirk Nowitzki famously hit 24 of 24 free throws in the Dallas Mavericks' Western Conference Finals Game 1 win over the Oklahoma City Thunder. He had a really nice streak going into the final minute of Game 2, with the Mavericks trailing. Nowitzki hadn't missed from the stripe since Game 2 of the Mavericks' series against the Los Angeles Lakers.
With the Mavericks trailing 104-98, Nowitzki goaded Nick Collison into a foul on a three-point attempt with 36 seconds left; it was one of those "take contact and heave" deals. Nowitzki had at that point hit 38 consecutive free throws: seven in the Lakers' series, 24 in Game 1 and seven in Game 2. If he hit all three of these, he'd make it a one-possession game.
He hit the first but rimmed out the second before making the third; the scored was 104-100, leaving Dallas in a tough spot. Rick Carlisle elected not to foul on the ensuing Thunder possession, but Dallas pressure forced a 24-second violation. Dallas couldn't convert its final three-point attempts; maybe the Mavericks would have failed if they needed one for the tie instead of two scores. But having that three-point margin definitely would be have been nice.
You can't fault Nowitzki -- he very clearly has the resolve to handle business in crunch time. Basketball works in odd ways, and no streak lasts forever. Too bad it ended when it did.