Summary

Where Michael Stevens (Vsauce) records the steepest forehead on the wiki at 49.6°, River Pheonix sits at the flat end with 4.3°. Mark Hamill's River Pheonix end of the scale is far from his own Browridge Inclination Angle of 30.6°, which scores 1.5 and sits above its ideal range of 15.0 to 22.0°. That places him higher than 95% of the men on the wiki, and only 45% of men measure inside the ideal range. His closest matches are Conor Mcgregor at 30.9° and Will Smith at 31.0°. For the full picture, see Mark's full Harmony breakdown and Mark's Upper Forehead Slope.