>Now try taking off your shoulder-strapped bag to hold it in your lap, without first taking out your headphones. This is really easy with a backpack, I assume

>Now try taking off your shoulder-strapped bag to hold it in your lap, without first taking out your headphones. This is really easy with a backpack, I assume it's only a problem with a messenger bag (which is probably a bigger problem for one's back, unless the load is kept very light.)