Saw this online:

"How did you come up with the concept of caking people at shows?

It was actually because of a Toronto artist I had signed to my label, Dim Mak, called Auto Erotique. They had a music video called Turn Up the Volume that featured a super slow motion scene of cakes exploding in people's faces. I'm always looking to add interesting things to my shows and so I took inspiration from that video. I did it once and people loved it; they went crazy, people started bringing signs to every show."

That video is on YouTube if anyone wants to check it out.

If this has been discussed before, sorry.