That is the ultimate case of right place, right time.
Boston and Toronto had gone into overtime north of the border and both teams needed a win as the fight for playoff positioning. Down one with 2.6 seconds left, Celtics coach Brad Stevens drew up a play that was all Isaiah Thomas — he started his run back at the opposing free throw line and so when he got the inbounds pass he already had a full head of steam and he attacked the rim hard. Lou Williams was running with him and James Johnson slid over to help. Thomas threw up a prayer looking for the foul.
That prayer was answered by Marcus Smart, who had crashed the board on the opposite side and put back what was officially a missed shot. Although it looked almost like a pass. Either way he nailed it as the clock expired.
The win moved Boston into the playoffs, pushing them ahead of Miami into the eight seed. It was an entertaining game with Williams, DeMar DeRozan and even Evan Turner hitting big shot after big shot. Smart just hit the biggest one of them all.