Originally Posted by stapfam
You can always be friendly and offer to service it for him- Then he will have to buy another bike.
After spending a half hour trying to adjust my brakes and only making them worse, I took the bike to the LBS and the wrench made it perfect in 90 seconds. Then he showed me what to do, and it all made sense, and I nodded appropriately, and off I went.
Fifteen minutes later I realized I had no clue what to do next time.