Dryer Balls

I learned a new tip/trick that I'm trying out...  Anti-static aluminum foil balls.  I got the idea from my friend Mel at Testosterone Overload.  I sort of forgot about it for a bit but today is the day!  I just put a load of wet clothes into the dryer without any dryer sheets.  I didn't use liquid fabric softener either.  I wadded up a tight wad of tinfoil about the size of a baseball/softball-ish and tossed it in the dryer with the wet clothes.  I'll let you know how it goes!
(About the noise, it sounds like you would expect a ball in a dryer to sound like... occasional thumps but not anything that would discourage me from using it if it works.)