I too past something similar 2 days ago. I wanted to collect it but was in a public restroom and couldn't. Mines looked like a cherry tomato except it was yellow. That was the second one I passed one of those. The first one was about 2-3 weeks ago. At first I dismissed it as a cherry tomato because I had a salad the night before. But, when it happened again two days ago I became alarmed and I booked a GI appt which I will go in a few days. Do you have any any idea what causes that? Its scary.