Now that is a brilliant piece of advertising. I would use a few wraps of det cord to cut it in half. You could use a carefully calculated shaped charge to breach the top half, but not enough to blow the whole thing up.
This would be my go-to solution, with two refinements.
1) They make a linear shaped-charge product. The controlled-demo guys use it for those pesky I-beams. I'd use a judicious amount on the top&bottom of the support post. That is the obvious weak spot imo.
2) recommended accessory: a tow truck. I'd wrap the cable around the intact frame a few times, then drag the entire shebang through the streets, riding high and taking bows.
(Until i got to my duck-out corner. Quickly trnsfer the frame to the ratty-looking van before the parade catches up. Have minion drive tow truck with a not-even-very-good decoy throwng sparks at the end of the cable.)
Drive ratty-looking van to the lair with the power tools. soon: Live like Midas Rex.

cn