Here's a clever trick: you can hand an unopened banana to a friend or family member, and as they peel the layers off, they will find that it is already cut in perfect slices!
While bananas are clearly not great foods for protein nutritional types, this is still a fun trick to try. The only two things you need to ensure this works are:
- A ready-to-go banana without dark spots.
- A long, clean needle.
If you enjoy doing this, you'll also like a recent article I posted on the fine art and physics of stone skipping.