Situation without a name

This may have been posted here before, sorry if that's the case.
Some time back, the magazine Atlantic had a column, the purpose of which was to provide a name for an everyday situation that most are familiar with, but which usually goes unnamed. The answers were usually humorous, involved puns/wordplay, etc. (Unfortunately, they stopped running the column.)
As an example, two people are walking down a narrow hallway. As they get nearer, both realize they are headed straight towards each other, so they adjust their respective paths. Person A steps to his right. At the same time, Person B steps to his left. Both are chagrinned to see they are still in each other's way. Awkward smile, embarassed laugh, they both adjust only to repeat the situation several times. Most people have experienced this, but there is, as far as I know, no name for it. (One reader suggested calling it the Ah Void Dance.)
Second situation involves walking on the sidewalk in a large, metro area. There are tourists in front of you who, because they are tourists, will stop and point at landmarks, take pictures, walk slower than the rest of the flow and in general impede the rest of the sidewalk traffic. What would be a good name for these tourists? (One I particularly liked was Speed Bumpkins.)
Other unnamed situations? Names for the above situations?