Sort:  

"When the bat-signals glow,
The Grumpy-Bat says NO."

Should that not be the Cat Signal?

"Why so serious?"

hehe not sure if you are being funny as well, but to clarify it was a joke my friend ;) Cat signal for a Grumpy Cat, makes sense no?

Haha I was joking by referencing Joker's dialog. And yup, it does make sense!

ahhh! Too clever for me. Very good. upvoted ;)

I think we're all from different generations of batman...