hitchcock be of the opinion that audience aren not really interested in what put protagonist into danger only that they be in danger and and need to escape . this film prove hitchcock be not 100 % correct . police believe jean simmons be guilty of a crime and when she plainly isn not . trevor howard decide their best course of action be to run for it . and so and the body of the movie have our charismatic pair dodge on and off train and bus and coach jump across rock at the top of a waterfall scramble across dockyard roof . all good exciting stuff but i couldn not get out of my mind that it be all unnecessary . they should have stay put . in other word and the macguffin wasn not strong enough .