[Grammar] How To Describe A Scenario or Non-Factual Situation? ( Tenses )

[athrun]

How do we describe an imaginary scenario? Do we use present, past or future tense?

Describing a non-factual situation to a someone

"Let's say, you are in a room, and someone comes in with a knife walking towards you. will you scream?"

or should it be

"Let's say, you were in a room, and someone came in with a knife, walking towards you, would you scream?"

Thank you.

 

[5jj]

I would not use a comma after 'say'.

In the first, I'd say, "; do you scream?" The second is fine.