@impunity,
To answer you,
1. The stratosphere starts at between 10 and extends to 60Kms.You can take the average as 18,000 metres depending.
2. At those heights,you would be dead within seconds without a special pressurized suit and helmet
3. Free fall took 4 mins and 20 secs while the rest was negotiated using a parachute.Total time to touch down was 9 Mins 3 secs.
4. Gatner had several cameras on himself;Helmet and chest.Others were on the helium balloon and the capsule which took him up.
Nothing great was ever achieved without enthusiasm.