You posted two One MegaByte images, in-line, served from a fairly slow server.
The stall was probably the forum's "thumbnail" feature choking on the big/slow images.
Ethan whacked that this morning, but still it is not-nice to put 1Meg images inline. Even if the forum software dummies-up the display size, the reader download size is still 1Meg. People on dial-up will have cold coffee before the page loads. FWIW, on a fast wire connection it took over a minute to load.
I've changed your in-line images to click-links. People who want to see can click; others won't have to wait to follow the thread.