It's very simple, because the pressure of the needle is high, the faster the penetration speed is, the greater the pressure is applied, and the explosion is normal. When the balloon is filled with gas, because there is air inside, when the air reaches a certain level, it will be bound by the tension of the balloon, and the gas inside the balloon will be compressed and interact with the external air pressure. When the surface of a balloon is punctured with a needle, the balloon will be punctured due to pressure, and the balloon will instantly lose its ability to bind the internal gas. Because there is a great difference between the internal pressure and the external pressure, the balloon will explode instantly, but this is not absolute. Just pay attention to the technique and use bamboo sticks and embroidery needles.

As we all know, balloons are made of elastic rubber, so they can hold different volumes of gas. When people blow a balloon, the gas in the balloon actually exerts a pressure on the balloon itself. As long as the pressure does not exceed the tolerance range of the rubber, the balloon will not blow up. If the pressure exerted by the gas in the balloon on the balloon rubber is greater than the tolerance range of the balloon rubber, the balloon will explode.

We can do an experiment, assuming that the balloon can burst 3 units of air, and we only burst 2 units of air, then the balloon will be full of elasticity and it will be difficult to break by hand. If the embroidery needle plunges into the balloon quickly, the balloon may not break, but the embroidery needle will stand on the balloon. This is because the pressure of the gas in the balloon on the balloon rubber is small. After the needle is punctured quickly, the pressure on the balloon rubber does not exceed the tolerance range of the balloon, so it will not explode.

However, if we rush into three units of gas, the balloon will be fully loaded. At this time, pinching the balloon by hand will give us a hard feeling, indicating that the gas stored in the balloon is close to the bearing limit of the balloon rubber. When we use the embroidery needle to prick such a balloon, although the pressure is constant, it becomes the last straw to crush the camel, and the balloon will naturally explode, which is related to the gas pressure inside the balloon, the external air pressure, the quality of the balloon rubber and the embroidery needle.