Thriller ideas

So we brainstorm again and came up with the idea of bank robbery. We came up with lots of ideas with it. As a group we liked the idea of showing the city, like what they did in 'Pelham 1,2, 3'. I think that was really effective because showing the city, characters with out giving the story away. There was also no dialogue which also added suspense to the audience.
We also looked at 'Reservoir dogs', which is a fantastic action thriller which gave us lots of ideas. One of them was zooming in to the characters to introduce them, then have a traditional style background. So then we came up with the idea of being set in a white van where the 3 robbers are getting ready and having that suspense in the van. Then cross cut to the bank which they are going for and shoot as if they are having a normal day at work, but not realising that what is about to happen. We are also trying to include the police but we are still in process of where we are going to include them in the sequence. But we have discussed that in the background we are going to have that busy city sound with police sirens in the distance.
As a group we have chosen to go forward for the bank robbery and have further ideas and how we can move it forward to make a brilliant thriller.