ok......

.....no-one mentioned ASL here! Put your pint pots away!
To perhaps clarify the terms of this challenge, it should have read:
Describe a way that I can reproduce more than 100,000 feet on my altimeter when using the correct barometric pressure.
Whilst Mark and Smokey are both technically correct in their answers (Love the ejection idea

), it's really about countering the claims referred to (not made) by MattNW. I've seen them myself where folks suggest they've acheived this.
Don't get me wrong here - I'm not calling them liars, I just think that they're mistaken.
So - if you think you've ever achieved it, and more importantly, think you can describe a way that it can be reproduced, get typing!
