In fact, lets run with that analogy. Let's say somebody bought a road bike. They'd rented a bike on vacation a few times, and were really enjoying it, so they decided to buy one (but didn't really know anything about bikes. They have some friends who are going to help out for the first couple rides in case of flats, ect). They go to the bike store, and ride some around, pick one out, and go home. Unknown to the purchaser, but known to the store employee, the front wheel wasn't on the bike all the way. It was cinched just tight enough to keep it on while being displayed in the store, but it wasn't tightened down. The employee never mentions this, just says have fun with your new bike!