Cats do jump out of windows. Cats are naturally curious and always exploring new things, which can easily lead to accidents. For example, if a cat leaves a window open and walks aimlessly on the windowsill, it might be startled and fall. Or, while watching traffic, butterflies, or birds outside, it's easy for it to slip and fall from the window. It might even fall while trying to catch a bird or butterfly. Cats in heat are especially prone to this as they are more restless. In rare cases, cats may jump simply to escape the confines of the house. Overall, cats jumping out of windows is a common occurrence, so please remember to close your windows. 
How to prevent cats from jumping off buildings:
1. Install safety measures. Install safety measures at windows and balconies to prevent cats from falling. Generally, installing security screens or similar devices is sufficient.
2. Remember to close doors and windows. Even in homes with safety measures in place, it's essential to keep doors and windows closed. This is especially important for cat owners with balconies; keep the doors closed to prevent cats from going out onto the balcony and potentially jumping.
3. Spaying/neutering. Besides being attracted by birds and insects outside the window, another reason cats jump out of windows is that they are in heat. Therefore, timely spaying/neutering is also a way to prevent cats from jumping out of windows.
