Whilst I get the funny side of that, the irony... there actually is a definition for the difference between trauma and abnormal trauma. The difference is whether it is normally expected within life or not.
For example, it is considered normal that you will die. It is considered normal that you will endure peer pressures during school years, ie. bullying, fighting, teenage rebellion tasks, etc. The list is long and extensive, which can be traumatic, but they are expected events within the normal scope of life. Even minor MVA's are considered normal trauma if you obtain a license or get within a vehicle, ie. the incident did not produce life threatening results.
Abnormally traumatic are events not expected or considered a normal part of life. Rape, torture, combat, serious MVA where fatalities occurred / fighting for life, cancer, etc etc.