I have no clear idea. It could be a fictional story full of surprises and twists. Or perhaps it's based on a real event that got blown out of proportion.
Shane could be an individual with a passion for the macabre. In the context of 'Shane telling scary stories', he or she is the storyteller. Maybe Shane grew up hearing scary stories himself or herself and decided to carry on the tradition. He or she might have a collection of age - old tales, or perhaps create their own original scary stories to share with others.
I'm not sure specifically which 'Tim Kempton Whopper story' you are referring to. There could be many stories involving someone named Tim Kempton and a Whopper (presumably the Burger King product). It might be a personal anecdote about Tim Kempton's experience with a Whopper, like a memorable meal he had or something funny that happened while he was eating one.
Regarding the patient's ghost story, it could be that the cold chills and moans are due to natural causes like drafts in the old building and the creaking of the old infrastructure. However, the fact that so many people have reported similar experiences makes it seem like there could be more to it. It's possible that the emotional energy of a tragic event in that room left an imprint that people are sensing.
One possibility is that Tim Kempton had a bet with his friends about how many Whoppers he could eat in a certain time. So the story could be about his attempt to win the bet, whether he succeeded or not and the hilarious moments during the process.
Some might be made - up. People like to tell spooky stories, and in a place like a hospital, there are a lot of elements that can be used for fictional tales.
Again, without more details, it's hard to say exactly who Jesse Smalley is in the story. He could be the main character, the narrator, or the creator of the story.