NBA fans can be very unforgiving of visiting players, and you can ask Oklahoma City Thunder swingman Andre Roberson about that.

When Roberson went to the foul line to shoot a pair of free throws against the Milwaukee Bucks Tuesday, fans inside the BMO Harris Bradley Center made sure to remind the Thunder two-guard how bad of a shooter he is by chanting “air ball”.

Roberson isn’t being paid by the Thunder because of his scoring prowess, as he’s a very poor shooter. He is connecting on just 40 percent of his shots this season and has a career free throw percentage of 48.9 percent—arguably a scarier figure than any Halloween costume worn by anyone.

Roberson is a huge defensive asset for the Thunder, however, and it’s his primary role to cover the opposing team’s best scorer. Apart from that, he stabilizes the chemistry of the Thunder, who now features three superstars in Russell Westbrook, Paul George, and Carmelo Anthony.

And oh, by the way, Roberson made both free throws in that sequence and even had the last laugh as the Thunder won, 110-91.