I taught myself how to burp on command when I lived in Arizona. Despite the disgusted looks I get when I exercise the burp, I still consider it my bestest hidden talent.
Walking home from dinner, or Activity Night as we now have to call it, I decided that the next person who looks at me is going to get it. Any person, no matter who they are. I am going to look them straight in the eyes and give them my most deadpan burp. Then carry on.