Originally Posted by
Rolla
Shorten the chain and wrap it around a ridable gear combo, bypassing the derailleur. The chain tension will probably be less than great, but for the rest of your life you can
insufferably flex that you ride a singlespeed.
This is what I did, back in the Dark Ages before carrying a cell phone everywhere was an option. Broke the chain, rewrapped it in small ring/mid-cassette, and rode the 8+ hilly miles home. Since I started carrying a cell phone, I no longer carry a chain breaker. AND I change my cables before they need it.