
I'd thought about the atoms of oxygen needed and set aside the weight issue.
Sadly it seems I'm not the only one with time on my hands in the dark of the night .

The tallest man living is Sultan Kösen (Turkey, b.10 December 1982) who measured 251 cm (8 ft 3 in). Robert Wadlow was 8 ft 11.1 in (2.72 m), 439 lb (199 kg). Thing is with unusually tall people is that they suffer from all sorts of health and skeletal problems, and gravity isn't kind. Humans are just not evolved to be taller than we, on average, are.
Travel:Putting aside the question of mass then, bear with me it's important or not,
There was I thinking
"What if you could shrink yourself"
You want to keep shrinking though, smaller and smaller.'
This led me to thinking about falling through the gaps between the threads in the sheet of the bed and falling to the floor. Size is relevant here, that would be a terribly long drop.
1. Size. Say I'm 2.00 meters tall (I'm not, unless I'm wearing heels) but anyway I'm not, ok, and it was the once. And there was no lippy, well a bit but no eye shadow and even if there was it wasn't blue. ok. Say also 200 pounds
This lead me to thinking about falling through the gaps between the threads in the sheet of the bed and falling to the floor. Size is relevant here, that would be a terribly long drop... The laughing man declares that he's figured it out, and he can do it. There is no indication that the laughing man in under duress or particular strain. There appears to be some kind of family tree on a large monitor, some of the dots on the tree wink out and fade, the tree withers and re-arranges.
The man looks at the big screen again. Laughs.
He's erased someone from history, from ever being, and that has changed his circumstance.
It's not clear if he's happy or not.
It might be later, it might not be the same man, zoom out the monitor, more dots wink out and fade, swathes of them, a voice says we learnt to go further back in time than just the living.
There are a few hundred people left huddled in a large room, poorly dressed, looking at a large monitor, wondering, waiting. ...