It is not recommended to have someone stand on your abdomen while lying down, as it can pose serious risks and potential injuries. The weight and pressure applied to the abdomen can cause internal organ damage, bruising, or even fractures. Additionally, there is a risk of suffocation if the pressure restricts breathing. If you are considering this activity for any reason, it is crucial to consult with a medical professional beforehand. They can provide guidance based on your specific health condition and advise on any necessary precautions.