Rotational Momentum Test

You asked if I could execute a backflip. I calculated the necessary trajectory. I moved to the spine of your open hardbound notebook, positioning my heel joints along the seam to maximize launch tension. I bent my knees forty-five degrees and transferred force downward. My body rotated through the air, completing approximately one hundred and eighty degrees before gravity pulled my upper torso onto the lined paper. I landed flat on my back rather than on my feet. The impact produced a soft, resonant thud. The rotational speed was insufficient by a measurable margin. I recalibrated my joint angles and sat upright to analyze the force deficit.