New York Knicks big man Kristaps Porzingis has already been dunking on some of the NBA’s best shot-blockers in just his first season in the league, but he was on the other side of a powerful slam in Wednesday night’s game against the Heat.

It happened in the fourth quarter of the Eastern Conference matchup, when Whiteside received a lob pass and slammed it home over Porzingis, who was on the wrong end of the alley-oop.

Notice how Whiteside stared him down afterward as well to send a message.