Just to clarify one thing… you are not limited to two paragraphs, and if you go longer you will not be disqualified.
However, this is meant to be your story about one short encounter, five minutes or so, a brief moment in time.
If it takes you 3 pages to get your encounter described the way you think it should be, go with it, it’s your writing. You won’t be excluded.
Give it a shot; creativity, imagination and fun will matter a lot more than how many words or paragraphs you use.