Here is a concise summary of the text:
**Title:** DIY Supersonic Whip Experiment (Backyard Scientist)
**Summary:**
* The Backyard Scientist shares a fun project from Maker Faire NYC: a supersonic whip made from just rubber bands and string.
* The whip can break the sound barrier, creating a whip-cracking sound, and was initially discovered by accident while trying to create a cat toy.
* Experiments with the whip include:
+ Popping water balloons with ease (captured at 1500 & 5000 frames per second)
+ Attempting a flaming whip (soaked in carburetor cleaner)
+ Hitting a soda can to open it (successfully cracking one with a larger whip)
+ Testing pain tolerance by getting whipped (with mixed results)
* Bonus: A brief segment on creating Oobleck-filled balloons and testing their durability against the supersonic whip.
Here are the extracted key facts, each with a number and in short sentences:
1. **Event Attendance**: The creator, "Backyard Scientist", attended Maker Faire in New York City.
2. **Panel Participation**: The creator spoke at a panel titled "Learn-by-Doing" at Maker Faire.
3. **Experiment Materials**: The "Super Sonic Rubber Band Whip" experiment requires rubber bands and a piece of string.
4. **Whip Construction**: Double-chaining 5 rubber bands and tying a ~4-foot long string creates the whip.
5. **Whip Technique**: Holding the string and first rubber band knot with thumb and index finger prevents hand smacks.
6. **Safety Precaution**: Wearing safety glasses is recommended due to potential string rebound.
7. **Experiment Variations**:
* **Balloon Popping**: The whip can pop water balloons.
* **Flaming Whip**: Soaking the whip in carburetor cleaner creates a flaming effect.
* **Target Practice**: The whip can hit targets like soda cans.
8. **Supersonic Speed**:
* **Evidence**: The whip's tip breaks the speed of sound, visible in slow-motion (1500 & 5000 frames/sec).
* **Shockwaves**: Forming shockwaves are visible when the whip breaks the sound barrier.
9. **Whip Maintenance**: The whip will get shorter over time due to fluff breaking off during supersonic whips.
10. **Oobleck Balloon Challenge**:
* **Materials**: Empty 2-liter bottle, cut-top bottle (funnel), and Oobleck.
* **Trick**: Balling up the balloon before filling helps pour in the Oobleck.
11. **Oobleck Balloon Durability**: The Oobleck-filled balloon is tougher than a regular water balloon but can be cracked with the whip.