by dat8962 » Jun 17th, '06, 18:39
If you can do the spread sometimes and not others then it's down to technique and practice.
The more that you work on it, the more that you will increase your consistency.
Start slow and then build up your speed but not too fast

This is one of those tricks that is as much about timing as technique (in my opinion that is

)
Member of the Magic Circle & The 2009 British Isles Close-Up Magician of the Year
It's not really an optical illusion - it just looks like one!