And for those of you of who haven't seen it, here's Jurgis Kairys and one of the ten bridges of Vilnius he did a few years ago.
1.4mb video...
"Proceed Inverted. Not below 4ft."
(There was a fine. For illegal cigarette advertising
The then Lithuanian prime minister, an ex aerobatic champion himself, took pity and paid the fine for Kairys.)