A Fun Trick
i havent done this in the longest time, but i assure you it will work every single time.
next time you and your friends (preferably 4 or more) are in a crowded place, for instance a diner, everyone just shush really loud.
"SHHHHHHHHHHHH!!!!!!!"
the entire place will fall dead silent, regardless of how many people are there and how loud they are all yapping.