[BluePen7]

Unless you have a bus route that goes straight to the auto parts store, yeah that's the ideal.

Often I'd invite a friend over while I did the work, keeps me company and that way they can be the backup vehicle (and I'd return the favour).

[smileysteve]

This is a great example; said friend also convinces you to stay hydrated, double check your safety, and not just apply more force in the wrong situations.