Stone's attack 'performance art'

Loyalist Michael Stone's planned incursion on a crucial meeting of Stormont politicians was "performance art", his defence lawyer has claimed.
BBC:

We all know it was a 'right performance' we are just not sure about the 'art'.
It's probably just as well they grabbed him when they did - otherwise, like most performance artists, he might have removed his clothes (Not a pretty sight!).