Particularly noticeable in urban
settings, this phenomenon
can be succinctly described as:
the increase in effect of gravity upon reaching the last steps in a flight (especially when the series of steps is at the exit of a subway platform during rush hour), leading to a general slowdown, yelling, frustration, and increased latency of the people farther down the stairwell who have not yet gotten to the source of the traffic jam.
lazy, traffic, people are stupid