Jonathan Isaac may have had some slight butterflies prior to making his NBA debut on Wednesday against the Miami Heat.

In a video shared to Twitter by Orlando Magic teammate Bismack Biyombo on Friday, the rookie forward sat on the bench for the team’s season opener having forgotten to wear a jersey underneath his warmups. He quickly ran to the locker room to put one on upon realizing his mistake.

The 20-year-old Isaac, who was picked No. 6 overall in this year’s draft, would eventually check in at the 3:10 mark of the first quarter.