The Dark Tower: 15 Easter Eggs You Probably Missed
10. Cujo
Cujo, the good dog turned murderous after an encounter with a rabid bat, can be spotted going for walkies in The Dark Tower.
The scene crops up while Jake and Roland are in New York City, and this version of the big St. Bernard looks like he might actually be safe to take off the leash.
You might consider the possibility that this is just a random dog which happens to be the same breed... except Stephen King himself has confirmed that Cujo features in the film. So there you have it.