They were a night airshow act on Wednesday. Very entertaining and unique with 5 (?) flying in formation. They even flew aerobatics, believe it or not.
The downside was that one of them launched early and interfered with the B-1's last pass. We were watching from the show line and it was very obvious that the powered parachute was somewhere he wasn't supposed to be at that time. Word on the EAA forums is the airboss wasn't happy and they almost cancelled the B-1's last pass...