Subject: How can pieces of stars that collide while entering a black hole 'jet' out

Tonight, while watching a show about the Hubble telescope, I saw a computer
animated film of a black hole.  In it, the black hole was illustrated to show
the speed of the rotating stars around it.  They showed a jet coming out of the 
center of the black hole and explained it as being debris from the colliding 
stars as they are sucked into the black hole.  I thought not even light could 
escape.  How and why do these debris get away and why does the debris jet out 
instead of shooting off in random direrctions as you would expect from an 
explosion. Thank you for any info you can provide.

Re: How can pieces of stars that collide while entering a black hole 'jet' out