This dunk is impressive... and so very Summer League.
Memphis’ Vander Blue was one of the more interesting undrafted players at Summer League, and here he makes a nice baseline cut and has a great finish. What makes this play so Summer League is the way his defender completely loses track of him then there is no defensive rotation to cover up that mistake or protect the rim.
Does that kind of thing happen in a regular NBA game? Sure. But not all the time, where in Summer League that’s pretty much what you see every game.