Yet Another Fatal Collapse-Pukkelpop Festival in Belgium

I can't even keep up with all these horrendous collapse tragedies.  

Here's a Google news search on the deadly collapse(s) at the Pukkelpop festival in Belgium.

Two friends emailed this to me, and one put it best--what were these people doing out in this kind of storm? 

There are initial reports of a possible tornado.  I don't have time right now to dig out European radar archives, but by looking at the intensity of the storm in the videos, my guess is that you could see this thing coming.  Storms of this intensity rarely just appear "out of no where".

Horrible and sad.