Thriller Opening Ideas

Our thriller idea concluded of 3 friends being kidnapped.
Each friend is going about their daily routines when a unkown person kidnaqpps them by placing a black bag over each characters head. Once all the friends have been kidnapped they then will wake up in an unkown destination and are each tied and blinfolded.
The unkown person dressed in balck enters into the room where the three friends are held and shuts the door behind them, this is where the opening titles finish but just as they are an echoing scream is heard to suggest that something has happened to the girls.

Shot types:
Slow panning of the corridor, to suggest that the girls are in an unknown area and are alone.

Close ups: Close up shots of the characters are needed to introduce them and beable to read their reactions easier.

Zoom outs: Shots focusing on the characters and then zooming out to reveal that they are tied up and that there is more then one character tied up!