All balloons will eventually be deflated or popped. Some people do it on purpose, and sometimes it just happens.
Most of the time it is because of:
- Overinflation (usually intentional)
- Sharp objects or heat
When a balloon pops, it will break into several pieces, and a loud sound will be heard. Some people are afraid of this, and some people enjoy it.
While some will try to pop them in these ways:
Much more info waiting for you in this area : Balloon popping