Oh man...I hate to say it, but....nahh, I won't....

Sorry to see that happen to your Swift. Man, the paint is even still factory fresh. So I take it the frame failed while you were riding it. I hope you didn't take a spill.

For kicks, I tried fitting my Dahon VD5 post in my Swift. With both clamps tight, the rear triange pivots forward about a millimeter when I lift up the back of the bike by it's seat, which probably means that the Dahon post is not the same diameter as the Swift post (even though they're both stamped at 34mm).