Kid's don't try this at home.
There is a story about Nariyama and some American sensei whose name escapes me. From a certain distance using a gun firing blanks the latter sensei could dodge the wadding. Nariyama tried several times and got pretty burnt for his failures. Not sure if he suceeded in the end.
It's a parlor trick that must be practiced to succeed.
It impressed Nariyama shihan.
A lot of pain was involved.