You'd better hope you're carrying a chain tool!  Which I wasn't today.  I had to coast the way back.  And in places where I couldn't coast, yeah.  It's embarrassing to walk a bike.  I had the chain for a little more than a year so it's probably best replace it anyway.

Back at the ranch, let's gather the materials.  A cheapo baking pan in which to wax the new chain, a new Shimano HG-53 9 speed chain, the trusty Park multi tool, and the Weller Portasol. 

With the new chain, I remove a couple of links so it isn't super slack.  Then I lay the chain edge-up in the pan, to be covered with dry wax.

Let's pull a chunk of ptfe-bearing molten speed wax out of the bag.

With a pair of scissors, shave wax to cover the chain completely.

The fun part: I enjoy melting the wax into the chain with the Portasol.

Once a satisfactory amount of wax is melted into the gaps of the chain, it's time to mount it.

You know that feeling you get when you have new stuff on a bike?  Yeah, we have to ride it to make sure it works :)