Hey Axe - if it makes ya feel any better, here's a quote direct from Ian's website - it isn;t actually 400 feet, but only 300 wink

"The first 10 feet provides the adrenaline, the next 200 feet provides an unforgettable experience and sights to behold, the last 100 feet takes you down through the rainforest canopy. But before you start it all .. you might just throw up! "

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But then what do I know, I am but a mere caveman