I think they look really cool and i want to know how to make one…

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Answer:
Here’s a video from youtube:

http://www.youtube.com/watch?v=XEBi6-_yW…

other sites:

http://www.hgtv.com/crafting/duct-tape-t…

http://www.ducktapeclub.com/ducktivities…

http://www.instructables.com/id/Duct-Tap…

http://www.bbc.co.uk/dna/h2g2/A1021870