Don't worry you aren't missing anything useful. They are two videos of 'hardcore' free-riders snapping the headtubes off their ALUMINUM bikes while dirt jumping. (It is also likely that they had suspension forks too long for their frame design... but I digress)


ride slowly and you'll be fine. you should give the frame away to someone poor when you leave china. someone there will weld some reinforcing steel around the area and use the bike to get around.

take care,