I worked at a place where tips are very uncommon. A lady gave me one of those fake $20's once in a little envelope and I was fucking stoked. Put it in my pocket til break time n went to grab some lunch compliments of the nice customer. Go to pay, open the envelope and pull out this bullshit Jesus ad. I almost blew a gasket. I splurged on a nicer lunch that was outside of my budget thinking hey, it's free. Why not? I was never nice to that lady again.