Hot Wheels builds world's highest wall track
Constructed for the BCN Fan Fest during the Spanish Grand Prix in Barcelona, the repeating sections of track were assembled on the ground and then raised into place where they were connected to each other. Oddly, no official height was given for the track, but you can scroll down to watch a video of it being built and, of course, used. The video is in Spanish, but the thrill of rolling tiny cars down a huge track is universal.
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