Here is a concise summary of the provided text:
**Title:** Building a Secret Underground Beach Fort
**Objective:** Construct a hidden beach fort without getting caught. If caught, the builders must jump into the ocean with their clothes on.
**Summary:**
* A group of friends build a secret underground beach fort, digging a 4ft deep, 6x6ft hole and assembling pre-built walls.
* Despite encountering rocks and concerns about air supply (estimated 2 hours), they complete the fort and decorate it.
* A friend, Michael, is challenged to find the hidden fort within 20 minutes. If successful, he wins $100, and the builders face the punishment.
* Michael finds the fort in approximately 7 minutes, and the builders are punished with a clothed ocean jump.
* The video concludes with the friends fulfilling their punishment and cleaning up the site.
Here are the key facts extracted from the text, keeping each fact short and numbered, without including opinions:
**Construction and Planning**
1. A secret underground hidden beach fort was built.
2. The builders had to dig a giant hole discreetly.
3. Pre-built walls were used for the fort.
4. The hole's intended size was 6x6 feet, but it had to be dug slightly larger.
5. The digging depth was limited to 4 feet to prevent collapse.
6. Extra helpers were brought in to assist with digging.
**Construction Process**
7. The builders encountered numerous rocks while digging.
8. Bedrock was hit approximately 3 feet into the dig.
9. The fort's walls were assembled and then covered.
**Decoration and Inhabitation**
10. Decorations included chairs, boogie boards, beach balls, plants, and lamps.
11. The builders left the bottom layer of sand inside for texture.
12. The fort was equipped with Sprite and other amenities.
**Challenge and Search**
13. A friend, Michael, was given 20 minutes to find the hidden fort.
14. If found, the builders would jump into the ocean with their clothes on.
15. If not found, Michael would receive $100.
16. Michael searched the area, considering the location's geological features.
17. He eventually found the fort in approximately 7 minutes.
**Aftermath**
18. The builders had calculated only about 2 hours of breathable air inside.
19. Upon discovery, the punishment was invoked: jumping into the ocean fully clothed.
20. The group cleaned up their mess after the challenge.