Balloon leaking?/advice?

I was ballooning last night for about half an hour or so after my regular routine. Today i woke up and started to jerk it, but then i saw that some sperm was leaking out, and i wasnt even to the point of climax. has this happened to anyone else? Is it normal? build up from yesterday? Am i ballooning wrong?

It’s fine man… just means there was some pre cum from your previous session that you didn’t squeeze out.

thanks