Eddie Van Halen’s musician son, and also known as a huge Tool fan, Wolfgang Van Halen posted a recent Twitter photo and broke one of the biggest rules of Tool during the concert.

As you may know, using any mobile phone or similar devices during the Tool show is prohibited by the band itself. Apparently, Wolfgang Van Halen doesn’t care about that rule.

Here is what Wolfgang wrote:

“Tool was phenomenal (as always) last night.”

A user named Jhon commented on the post:

“Interesting that Tool allows you to take photos at the show, but it was a no photo policy for A Perfect Circle. And on top of that, I bought a $100 Hoodie from the show with a broken zipper and no help from the merch peeps. Rock on Wolf & Ed!”

You can see the tweet and some fan reactions below.