Revealing mistake: The quick shot of the Bible landing in the drawer is reversed. (00:29:20)
Continuity mistake: When Mike first enters room 1408, there are three light switches on the wall. He flicks on two of them. A few seconds later, you see the switches behind him, but it is two different switches that have been flicked.
Continuity mistake: The blood stain on the bath's curtains differs between shots.
Continuity mistake: In the scene Where Mike Eslin's hotel room has frozen over and he is laying on the floor talking into his recorder he notices his computer turns on and his wife is talking to him. As Mike tries to get up you see his head touch the alcohol bottle, in the next shot that is further away from Mike you see the bottle is much further away from his head then it should be.
Continuity mistake: When Mike reaches the phone and hears the operator asking if he is checking out, the phone on the table swaps from facing down to up between shots.
Continuity mistake: While Mike is presenting his book, the cigarette on his ear is semi-hidden by his hair. Half a second later the hair appears shorter and the cigarette is visible.
Continuity mistake: Mike enters the hotel and a woman in the back, sitting next to the woman with the pram, disappears between shots.
Chosen answer: He sums up the individual numbers: 1+4+0+8 = 13.
Twotall