Pen and Embroidery Hoop
![A pen sitting on top of a embroidery hoop which is on top of an old coke glass bottle](/media/libraries/college-of-science-and-engineering/physics/images/demo-images/PenAndHoop.jpg)
PIRA: 1F20.36
Materials: Coke Bottle, Embroidery Hoop, Pen/Glue Stick
The inner ring of an embroidery hoop is balanced on top of a heavy, glass coke bottle. A pen is then balanced on top of it. The hoop is swiftly snatched away, and the pen falls straight down into the bottle. Fun party trick at Grandma's.