RNoAF Falcon 20 almost does a barrel roll!?

as i was i at the Sanicole Airshow 2 weeks ago, the Royal Norwegian Air Force performed its flypast with the Dassault Falcon 20 electronic warfare aircraft.
during the 3rd pass, the pilot pulled the aircraft up like an F-16 and started to perform a barrel roll!
as the jet was inverted, i could hear the controltower scream over the speakers to break off the maneuvre, pretty sure the pilot got grounded or suspended on his return home.

i was surprised the old Falcon 20 was capable of those kind of aerobatics?
is the aircraft structurally capable of doing this, or was the pilot just plane crazy?