Just a random bit of useful info from one of my son's PHCE lessons (teacher is ex-police 🙂) ...
If you're ever stuck in the boot of a car in a kidnap situation, there is usually a very visible quick-release handle inside. If not, or if the kidnapper has disabled it, you may be able to pull up the flooring of the boot and find a wire that connects the dashboard to the boot's quick release mechanism - pull it towards the driver and the boot should release.
Otherwise, find the wiring for the brake lights and pull them out, or smash them from the inside using whatever tools you can find - the car is then more likely to be stopped by police.