I'm at a tall building, like the Space Needle, but it's a hotel at which I am staying. I go out on this platform at the top, and see drones flying around everywhere. Some of them are huge, like flying alien castles, quite an amazing sight to see.

Some time later I invite some people to come up to the top with me. From the bottom, I get in the elevator with my nephews, an exclusive elevator only for people who have rooms in the hotel, with an elevator operator who checks for your room key. We start going up, for a while, but then it feel like we are falling, very quickly. The operator is on the floor in the corner, as if bracing himself, and I start to worry about something being wrong, so I ask him if everything is ok. He says it's fine, rather impatiently, but my wife called the elevator from the bottom so we're going down to get her. I tell him I don't have a wife.

We get back down to the bottom, and it turns out that we have to pick up a large item, like a new sink toilet for a room upstairs. The item is huge and requires us to duck down on the floor in the elevator, with the item above our heads.

We start going up again, but the cramped position is making me feel claustrophobic. Then for some reason the roof of the elevator, which is cardboard tile like in an office, breaks a little bit and starts raining small debris down on us. That makes me feel even less comfortable, but I just tell myself that it won't be long, I can bear it.

We get to the top and go out on the lower platform, but I tell my companions that we can go up to the upper platform, which is better because there are no fences to block your view. The upper platform is smaller, apparently, so that if you fell off it you would fall only to the lower platform, instead of a thousand feet to the ground down below. So we go up a flight of stairs to the upper platform.

As we walk out, I tell my nephews to stay far away from the edge, and to look at all the drones. I joke to my brother Steve, who is also there with us, that I thought about bringing one of my drones up there (In real life, I have several small remote-control helicopters), but I always crash them, so it would be like a half-minute before they would just fall off the tower and be gone.

It's really windy up there this time, and the tower sways under our feet, which is scary. One particular gust makes it sway so much that we all stand still and hold our balance, except my climbing friend Mark - dressed in red - who happened to be off balance, and I watch as he topples backward off the tower into the distance. Somebody says 'Mark fell' and I ask if he's ok, I think hoping that he fell only to the lower platform, but they say no, there's no way he could have survived, even with a helmet. I peek over the edge and see him far away on the ground in a pool of splattered blood, with people gathered around him.

Everybody scrambles just to get off the platform and back into the building, but to get back I have to go across this narrow beam. Petrified, I sit down on the beam and inch my way across. At the other end I have to climb back onto the platform, but I have to get around somebody who is in the way, sitting on the edge of the platform. Then as I'm trying to climb up, some plastic material is flapping in my face and in my way.