I quickly pulled out the index card, and the penny fell into the cylinder below. I had my students divide a sheet of paper into 3 columns, and write one of Newton's 3 laws in each column. Then they had to write at least 2 ways in which each law was illustrated in the demo. The students really got into the activity and wrote lots of great examples. Take for instance the card and coin demo.
Most inertia demos are actually impulse demos.