His mom kept taking the bodies out of the well so he wouldn't get in trouble??

I think this sounds right.

bingo. The mom hid the bodies.

It's been a crappy day. I woke up late, I skipped breakfast, and I think I forgot to lock the door, too. And to make matters worse, my boss yelled at me again today. All the girls in the office hate him. The bald bastard. "I wonder if he's that guy who keeps stalking me?" I say to myself as I go home.
Home, of course, is a cheap-ass apartment with a living kitchen and a seperate bedroom, and not even a window facing outside. Not that I care. It's cheap. I unlock the door and go inside.
The place is trashed. Somebody must've broken this morning... Crap. I'm tired. I'll just call the police tomorrow.
I decide to skip dinner and head for the bedroom.

The person who came into his room must still be in the apartment: why else would the door be locked when he left it unlocked?

correct... and we'll going to have a hot night tonight.

I got run over by a hit-and-run driver, and I had to go to the hospital for a month. When I finally got out, a good buddy of came over to hang out.
"Sorry I couldn't go see you in the hospital."
"It's cool, man."
"Did you see the guy who did it?"
"Nah, it was too sudden. I don't remember."
"I see."
"You be careful too, buddy."
"Yeah, I will. Anyway, it's getting late, so I'm gonna head home. Next time I'll go see you."
"Thanks."

the buddy hit him???

yep that's a little bit easy. This one is also an easy one

It's five minutes to midnight, and I'm on an express train on the outskirts of Tokyo. It's just me and a few other people, and then this one guy gets on. When he gets in, he looks around and suddenly has this terrified expression on his face as the doors close behind him.
He walks up to a woman, "Excuse me ma'am. Are you 28?"
"That's exactly right," the woman says. "How could you tell?"
He ignores her and turns to the man next to me, "And you, you're 45?"
"Why yes, that's right."
He looks to me, "And you're 35."
"That's correct. But how do you know?"
"And you miss, you're 50?"
"Yes, that's right. But I'll be turning 51 tomorrow, in five minutes."
When she says this the man goes white as a sheet.
"I have a special power: I can see how long each of you is going to live."

The train is going to crash or something like that and they are all going to die.

pretty obvious. The cause of the death is unknown but they will die all in less than 5 mins. Either by derailing or bomb or some kind of massacre happens on the train.

An old man says to me, "Wanna play a game?
Here's the rules. I've got a bunch of boxes, and inside one of them is the prize money. The boxes are heavy and strong, too heavy to ever open with your hands, but there are axes and welding torches and all kinds of things around them, and you can take as much time as you want. When you find the money it's yours."
Well, I don't see any way I can lose then. Worst case, I spend a night opening boxes.
"By the way, there are a ton of boxes, but if you give me 50$ I'll start you right next to the prize money."
Even better! I take out my wallet and give the old guy 50$.


The game starts.
The prize money is right in front of my eyes.