The Joker's Lair, 3:00 am

The aforementioned Joker was in a kind of “laboratory” that he created in an area of ​​his lair. Being very "bored", he began to play with the chemicals in his laughing gas and see if he himself could make it more deadly and therefore one more problem for Batman

He was just beyond bored and didn't see anything better to do at 3:00 am