>>107763988And these is a high stakes scenario. A lot of heroes died in a secret, safe place that no villains know about, Harley wasn't supposed to be there, she is a former sidekick of one of the most dangerous villains in the world.
The said they can't attack her because the foundations of the building is shaky, but as soon as she jumps out, superman can fly and catch her in seconds.
They just let her leave.