I do something similar to aznpos531 but I line the back of the box with some cheap aluminum cookie baking pans. Now my basement is cluttered and has a low ceiling so I usually hit my friend's place where he has a higher ceiling and more distance.
"Hey I'm the first one to say its a great country but its a straaaaange culture. This is a place where gun store owners are given a list of stolen credit cards but not a list of CRIMINALS and MANIACS. And now they're thinking of banning toy guns...AND THEY'RE GONNA KEEP THE F**KING REAL ONES!"
-George Carlin 1937 - 2008 (RIP buddy)