The offensive player will ram into the twisting Tacko, and be thrown to the ground like a slain cartoon character. As the official NBA rulebook puts it:
“A player is entitled to a vertical position even to the extent of holding his arms above his shoulders, as in post play or when double-teaming in pressing tactics.”
This has been broadly applied to help defenders and not just primary defenders, in situations where the offensive player is initiating contact. Players who leave their feet to block shots are susceptible to pump fakes and leave the rim unprotected to savvy drivers. Hopefully plays like that early in his career help teach an important lesson for how he can use angles and size to frustrate opponents, even if he doesn’t block a shot.