When a person blocks an isle in a store or line or the sidewalk by standing there looking at their iphone or other smart phone

A polite term for shoving a lubricated probe into the Earth's hole to release gas.

To be in a thread before an event, and in this instance; a locked thread

When a song on your iPod is written by a band by the same name on an album by the same name, so it apears as a block.