J.R. dons ski mask to answer for embarrassing defensive miscue

While it wasn't the only reason for the Cleveland Cavaliers' Tuesday night defeat, J.R. Smith's gaffe in the third quarter was certainly a poor look.

The 6-foot-6 shooting guard suffered one of the worst brain farts in recent memory, allowing Tony Snell to score an uncontested layup after leaving the court to greet friend Jason Terry.

Smith told reporters - while donning a ski mask - that he didn't realize he was in the game when he went over to greet Terry.

Whether he was simply playing dumb, we'll never know.

Here's the play in question: