(There is a program on the screen.) I will fire this gun on the screen of the laptop. Then I will choose a student who can read Part 1. I will click on the gun. Fire the gun! Now I got Number 3. Who is Number 3? Will you come up here and read the first part loudly so that the other classmates can hear you?...Well done. I'd like to choose another student using this gun. I fired the gun. #32 is on the screen. Will you come to the front, #32? Okay, now, read Part 2. Good. Go back to your seat.

If "fire this gun" is a way to choose numbers at random, then yes, this reads fine.