Will's recent bun experiments had me thinkiing of subs. The fillings stick out, or fall out, of my homemade sub sandwiches, or the top sits a mile from the bottom. They are never neat & tidy like Subway's. Maybe how the bun is cut is no secret, but I never paid any attention. I examined what was left of my Subway sandwich tonight and saw a cut of about 1/2" or so at the joined portion of top & bottom. That is, the slice went through the bun and then downward when it reached the far edge. Naturally, I asked AI how to cut a sub bun and was told the "hinge cut".