A red alarm light dropped in the middle of a DA lab. The researchers, acolytes and guards had all been pulled away to view some contrived plot devices that were happening nearby, so both the alarm and the escape attempt that it signalled went unnoticed.
A large group of gangly creatures made their way out of the lab and into the streets of Alleycity. Their wide, orange heads flickered as though lit from within by some infernal light (Or possibly a candle) and their long fingers ended in sharp metallic spikes.
The DAs Jack-O-mancers had been released.