Climbing a skyscraper without safety equipment is an extremely dangerous and not recommended activity. Here are some possible experiences and feelings: 1. **Extreme tension and fear**: Without safety equipment, you may slip at any time, and the risk of falling makes people feel great psychological pressure. 2. **Adrenaline rush**: When climbing at high altitudes, the body releases a lot of adrenaline, which may make people feel excited, but this excitement is accompanied by fear. 3. **Sensitivity to heights**: When climbing at high altitudes, you have a wide view, but you may also feel dizzy or uncomfortable due to the height. 4. **Physical exertion**: Climbing a skyscraper requires a lot of physical strength, especially without any protective measures, the body may feel tired quickly. 5. **Sensitivity to the environment**: During the climbing process, you need to pay attention to the surrounding environment at all times, such as wind direction, weather changes, etc., which will make people more alert. 6. **Coexistence of sense of accomplishment and fear**: Successfully climbing to the top may bring a strong sense of accomplishment, but at the same time there will be further concerns about safety issues. In short, climbing without safety equipment is extremely dangerous and may cause serious injury or death. No one should attempt such activities. The safety of others and yourself always comes first.