What is the primary danger when encountering loose gravel or sand scattered across a paved corner, and what is the proper response?

1. Gravel punctures both tubeless tires simultaneously within 2 meters
2. Loose gravel acts like ball bearings under tire contact patches, drastically reducing lateral grip; riders should slow down beforehand, minimize lean angle, and roll through smoothly
3. Sand mixes with chain lube to ignite fuel vapor in the exhaust muffler
4. Gravel blocks the motorcycle headlight beam from illuminating the road