Distant memory now, but I was learning to fly on a Rallye at the time this chap flew a Rallye through the Arc. As I recall, it was a time-expired one (something to do with the spar) that would have to be scrapped anyway so he didn't mind the authorities confiscating it.
Also recall he removed the wing tip fairings, and then flew through with a lot of bank on - the Arc isn't that wide!
A definite case of "don't try this at home, folks!"