Here is an explanation of the test. Have someone try it on you.
Rebound Tenderness
This is a test for peritoneal irritation.
]Warn the patient what you are about to do.
Press deeply on the abdomen with your hand.
After a moment, quickly release pressure.
If it hurts more when you release, the patient has rebound tenderness.
http://digestive.niddk.nih.gov/ddise.../appendicitis/