What's the grossest thing you've done on the CTA?

For our next edition of sticky-note confessions we want to know the grossest thing you've ever done on the CTA. Think back to when you slurped a bucket of old soup on the train, or that time you peed in a water bottle on the bus. Keep your answers brief and sticky-note sized and don't worry about including your name—your responses will be kept totally anonymous. We'll be sharing the most disgusting confessions next month, so don't hold back.