Most of us would have encountered a scenario, where the balloon they had tried to fill up gets exploded once in contact with a candle on certain occasion. Fortunately, there is a way in basic physics where we would be able to prevent that from happening.
Fill the balloon with air by blowing yourself.
Use a lighter and hold it below the balloon(it would explode).
Take another balloon and fill it with a little bit of water.
Once you have filled the balloon with water, fill the rest space with air.
Try holding a lighter underneath it. Unlike last time, it would not explode despite the bottom part of the balloon will turn into black color.
From the above observation, you might have seen that it is quite difficult to check the balloon from exploding unless you fill it with water.