Understanding the concept of "מדידה של מצוה" (measuring for a mitzvah).
Spraying Aerosol Cans into the Air. Bottom Line on Spitting into the Air;
Pushing Out a Dented Water Bottle, Using Toys That Are Made to Deflate and Put Away, Putting Back a Nail in the Shoe, and...
Squeezing out juices from fruits onto solid foods. (Part 2).