Trainwreck, what's the call

[justacoach]

Had the following play recently. Seeking guidance and advice

Both teams in double bonus

B is deployed in 3/4 court zone press

B3 is stationary at division line, 8 ft from sideline, as part of press defense defense

A1 inbounds ball to A5.

A5 throws a lead pass over the head of wing player A2 who runs toward the division line, looking backward while trying to receive pass. A2 muffs the pass and immediately trainwrecks with B3, who never left his spot

Your call

BTW, I had block on B3, A2 to FT line for bonus

Thanks