So you're lying on the couch when you hear someone trying to get in your front door!
You jump up, grab the end-table/weapon, and in the dark (mind you) you take it apart and are ready for war with however comes through that door!
When friends come by and ask about your odd end table you can take them into your confidence and display the table's hidden function. What fun!
Can you imagine the perplexed home invader when he sees you standing there with a table top attached to your arm and the leg clutched in your steady hand?
That will give him pause...before he shoots you!