I know that efect! I tryed it whith my web cam!its becose its tacing the picture of the pictute picture its tacing(this goes in a unlimited loop)

Try rotating the cam a bit!


The same thing is of you tace a miror and pace a nother one paralel whith other (same efect but much more faster)

PS:
Its cool to step in a coridor whith mirors on bouth sides!it loocks like its a unlimited room