Possible Exploit or somebody tell me please

I was watching a speed run in Naxx 25 and they were fighting Gothik. The gate is closed to go to the next room toward the four horseman and the shadow priest was on the one live side toward the gate and a hunter somehow got through that gate and was pulling all the trash to the room where they were fighting gothik which would speed up the run, of course, as the trash can run through the closed gates. They were also pulling the adds on the dead side through the gate. Would that be considered an exploit for a speed run? you are “cheating” the gate, which is not supposed to open until Gothik is killed.

Hi there, this has been a thing since original Vanilla, and it’s allowed.

Thanks. Wasn’t sure, been seeing some stuff that seemed suspicious.