Can someone enlighten me on what Jayson Tatum was trying to do here

Jayson Tatum with the perfectly-timed block from behind in transition

LeBron LeBricks the free throw, Melo goes for the rebound and tells Russ, "I got it! Fuck outta here!"

Thompson with the pretty finish on the pass from James - ABC

Jayson Tatum steps back for the 3 to end the 3rd quarter