six letters two words.

what a dull looking balloon, it doesn't even attract my attention and if you ask me I think it kinda looks like an apple too. What? No that's not the point here, what's important is when you let that single thread go. It slips away, and might never come back. But if you're lucky, it might get stuck on something and you get try your best to get it back. The risky part is when it hits something sharp and it just explode, like that. Well, not everything ends that sad, this balloon right here deserves a happy ending too you know? What if, the balloon floated away, far far away, and then it stopped. Some other kid notices it and brought it home. Well, that's just what if...
A balloon is filled with air, isn't it? It shrinks with time too, losing every bit of that bad air and leave only those that are worth keeping, even if it fluctuates to it's most pathetic form. The balloon only keeps that little much with it, that little much.
That single thread that you carefully hold on to.

Holding on too tight and you exert too much on it.

Losing your grip little by little and it would slip away.

Maybe not right away, but it happens.
There you are with that red balloon in your hand and the next thing you know, you are now desperately holding onto the edge of that only single thread. And then it's entirely up to you, whether to stop trying and let the balloon go or continue to pulling it in and it yours again.
The thread was starting to hurt your fingers, it bring tears to your eyes. You let go a little decided that it's best to give up and then you realize, that the balloon was way too important to give up on. You tighten your grip, ignoring the pain it's been giving you and you slowly try to pull it back in. Slowly, carefully, patiently, ignoring every bustling nerves and just waited, not sure if your effort was enough, you look up at the balloon. No matter how hard you try, it doesn't seem to be drawing nearer at all.
And then there you know it, it's finally time.
Well, a balloon is just a balloon, it doesn't know how to fight for itself. It certainly doesn't know how to fight for others either. It's understandable.