Logic Puzzle!

Have been musing about various logic puzzles latelty and thought I would open one up to the audience, so here it goes!

The Bus Riddle:

You live 5 minutes away from a bus stop, the bus waits at the stop for 30 seconds every 10 minutes. You wake up early one morning and have no idea what time it is, but you are late for work!

If running is twice as fast as walking. What do you do?

Suggestions in blog comments! ^_^

Ian