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			It's rather common in webcomics. It's where the term "beat panel" comes from. But for a novel, it is rather unusual. I most commonly see it in roleplaying or script-type formats. 
 
I however would not mind. I am so used to seeing it on tvtropes that it doesn't really register anymore.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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