In the vast majority of circumstances, its a bad idea to ride on the side walk. However, there are times in the real world that it may make sense. For example, when I come back into my neighborhood I have a choice, either:
a) make a left turn across a six lane road, then make another left turn across another 6 lane road less than a block later,
b) ride less than a block on the side walk, which rarely has anyone walking on it.
Riding slowly on the sidewalk, watching for cars, and pedestrians, with a healthy understanding that no one is expecting you to come from where you are coming is a far superior option to option "a".
If you want to be pendantic, the best legal answer would be to walk the block. However, done with a little common sense, any physical or legal risk from riding that block would truly be deminimis.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.