Don't let your flashlight go out right as the killer approaches
"The killer can't find us out here in the woods, so we should be safe for the night."
Cue flashlight flickering!
"Oh god, Jane, your light! Did you forget to change the batteries?"
Cue light out!
"No, no, NO."
Cue snapping twigs!
"Shhh! What was that?"
"I don't know. Let me pull out my other Life+ Gear 300 Lumen Flashlight."
CUT!!!! Adrianne, what the hell?
Your character doesn't have another flashlight. That's the whole point of the scene.
"Well, you know, I was doing some character work and I decided my character Jane is the type to shop on Woot, and they just had a two-pack sale on flashlights…"
I don't care what you think your character would do! This is the suspenseful climax of the film!
"Listen, this is my method. You need to let me OWN this character."
And your character wants to ruin the movie by having a backup flashlight? Fine. THAT flashlight will be ruined by the rain storm I'll dump on you.
"Nope, it's waterproof."
You're fired, Adrianne.