Walk blocker:
A person that suddenly stops when they are walking right in front of another.

Sneeze Freeze:
The frozen and contorted, usually mildly retarded looking, facial expression one makes for a few seconds before they let out a sneeze.

Skymall solution:
 An absurdly single-purposed tool or solution which solves a problem you don't actually have. Like many products in the popular in-flight catalog, Skymall.