Thanks for your question on Health Care Magic.
I can understand your concern.
No need to worry much for this because possibility of muscular spasm or pull is more.
Any sudden movement can cause reflex muscle spasm.
And this can be felt as something is coming out.
So possibility of muscular cause is more in your case.
So avoid such type of sudden movements.
If similar thing appears again than get done
ultrasound examination of abdomen to rule out abdominal
hernia.
At present, no need to worry for this.
Hope I have solved your query.
I will be happy to help you further.
Wish you good health. Thanks.