Yeah Quicksilver. Rolling multiple flail boomerangs by Martin Aparijo and the famous Woody Itson frame stand. You have a good point about flatland being attempted on other bikes, however I have one good point: Most of the tricks in the past that were attempted on bikes other than BMX [20"] in the early days, I'm sure, pale in comparison of what's being attempted today. I missed the Suzuki Series, but did attend the Ninja Spin in Acheres, France. Watching most of these guys ride makes me wonder if any of it is possible on a bike other than a 20". I'm hoping to change all of that with a lot of hard work.
I'd really like to see some video of your friend. I was in Scotland just a little while ago and talked to a guy there with a 24" frame.
Thanks for the insight and reminding me to go and rent quicksilver. BTW: I haven't looked it up yet, but if memory serves me correct, the riders were Moralez, Aparijo, Itson and a couple more--they were all 80's pro BMX'ers.