is er necessary in any question with no subject?
This phrase always reminds me of the Fountain of Rhyme
https://www.youtube.com/watch?v=-a63y4P4QaE Watskeburt (slang version of wat gebeurt)
Aw, thanks for this! This song was on the radio a lot when I worked in Belgium for a couple of months... back in 2005! I love listening to it in the car :)