Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: I was the escalator usher . My job was to keep people moving when they arrived off the escalator and make sure aisles were not clogged . You would think that would be an easy job , but oh no .

Question: What may be the reason for needing an escalator usher ?
There was an event with a lot of people .
To keep aisles unclogged and help people move.