Triptease

Triptease is going to be a film about a group of three friends who decide to stay in for a night and try taking a new drug which has been recommended to them by another friend.
The situation will take a turn for the worse when the group of boys start to be unsure of how much the drug is affecting them. I want to create a twist in the film, and not give any indication of any drugs being involved until the last scene.
The opening scene will be the three friends back at their house after just meeting their friend to collect the substance, and have just taken their first dose. The will be slight references to where they have just been, to give the viewer a slight hint to what is going on. After the friends sit down and have a cigarette they notice one of the group has left the room. The two boys that are left in the room start questioning one another how each other is feeling. Both are unsure of how much the drug is affecting them, but both are aware of a change of lighting and how the perspective of the room has changed.
One of them decides to go and see where their friend is which is when the drug really starts to take effect. The lighting in the house will change to quite dim, and I will use lower down camera shots to emphasise the confusion. I will also use shadow effects behind the characters to endure fear into both the character and the viewer.
I will switch between these two characters and show their experiences on the drug. The story of the third member of the group will begun to unfold. As he begins to sober up he realises he is outside, and re-enters the house to find one of his friends on the sofa with this head in his hands, and the other aimlessly walking round the living room.
The mood of the film will lighten at this point as the effects of the drug start to wear off. The two boys will then walk into the living room to find their other friend beginning to sober up.
After all in a state of shock and in confusion, the characters will all look at each other in disbelief, this is when I will show the user that it was all a drug trip, when one of the character will mention the name of the drug and ask if they want anymore.