How to test the FX Chrono without pellets or an airgun

For whatever it's worth...

To test for functionality the FX Chrono: Set the "profile" in the FX app to "nerf", the lowest velocity range. Get a larger drink-straw and form aluminum-foil wrap into small balls. Place the straw over the FX Chrono as you would with a barrel and blow the aluminum balls from the straw. Velocity should be anywhere from a few fps to over 100pfs.

What can you do with this? Not much. Just to get an idea how it works and the angle of detection.