A certain supernatural filmmaker’s publicist apparently put a damper on “Arrow” star Stephen Amell‘s time at Comic-Con last weekend.

Amell publicly slammed M. Night Shyamalan’s publicist, Kathryn Rowe (Amell left her unnamed in the post), on Sunday, calling her an “all-timer level a–hole.”

“What a wonderful SDCC,” the actor wrote. “So many lovely people. Except M. Night Shyamalan’s publicist. She’s an all-timer level a–hole.”

It’s not clear was prompted Amell to make the statement, and he did not elaborate further on Twitter. Shyamalan was at the San Diego convention to promote his new film “The Visit,” which hits theaters in September. “Arrow” held a panel for fans as well.

CAA, which reps Amell, did not immediately respond to request for comment.