Tonight a boat will crash into Kingston riverside, injuring several passengers on board.
But fear not, for it is only a training session for the RNLI life boat crew.
Teddington RNLI will carry out a practice rescue mission with Turks Launches near Kingston Bridge, starting at 7pm.
The exercise, used as a training method for the lifeboat crew, will simulate a collision of a boat with passengers on board.
The crew will pretend the passengers are injured and will handle the exercise as if it is a real scenario.