Did anyone can help me.What kind of theory they use for this demo?

http://www.youtube.com/watch?v=-MUJHxHY75o . This people want show their bracelet is so powerful.But i know there are trick on that of something in science and describe this.

1. You don’t know if the two people were not working together…

2. You don’t know if the man holding the microphone was applying the same pressure both times…

3. It looks like in the first two instances the man with the microphone was pulling the other man off balance but not pulling him off balance in the second two instances…

Quick Shoe Tie Trick – Demo & Explanation

Music From SSX Tricky $12.98 SSX Tricky by Various ArtistsThis product is manufactured on demand using CD-R recordable media. Amazon.com’s standard return policy will apply….

Trick Dazy demos $3.96 …

Eye of the Storm $5.54 CD contains 11 songs….

Understanding the Canon Speedlite 580EX II/430EX II $19.98 This DVD uses the same material as our original 580 EX/430 EX DVD. Demonstrations of Speedlite operations have been updated to show the 580 EX II/430 EX II models. Your new EX II Speedlite from Canon can be the most powerful accessory in your camera bag! Understanding how the Speedlite’s controls work is important, and this DVD takes you through its operations, step by step. Your host, Tim Mantoa…

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