Gotham Underground/F(r)iends

F(r)iends is the first issue of the comic series Gotham Underground.

Joker's Story
Alarms blare through the halls of Arkham Asylum as a doctor grabs a microphone. Sewage is seen being pumped out of Arkham. In the waters, a purple fingerless glove bursts out as the Joker's laugh echoes through the night.
 * Doctor: Attention everyone, be alert! Patient 1506 has escaped his cell! I repeat, the Joker has escaped his cell!