You pull the box out of the Blue Sky machine, and inside is a:

Happy Thought

:D I know it's not super expensive, but still nice!

and then this...

Random Event You hear some strange chanting in the distance, and trip over a glowing amulet on the ground...

Yay! DPs are always awesome pulls :D

Yes, vending does give out happy thoughts. Happy thoughts of Riptides, of wearables...

Congrats!

Congrats on getting such a nice surprise :D