I saw a news report a while back where some company was selling helium kits so schools could send up a big balloon with a tiny camera attached to it, that would transmit the images back to the school, so the kids could see, essentially, the edge of space.
I wondered how many of those kits would you need to lift a human to the edge of space - or pretty high up?
Got to have a lot more lift than a hot air balloon, right?
And if that happened - ignoring wind, etc - assuming you went straight up, and the earth is spinning - how long would it be before you were over the Pacific - or Europe - or wherever?