You know it's a good sandwich when...

You wolf it down and choke to death on the last bit.
You wet yourself after the first bite.
You only take a bite from it every couple of days.
You document your success and try to repeat the experiment for the betterment of mankind.
You commit a Japanese form of suicide because there will never be another like it.
You go on livejournal and rave about it to your friends.