Tap knees with hammer or any other object?

[andreschad]

Excuse my stupidity, what is its effect? Because? is it serious? I see him reading in several parts

 

[andreschad]

Disculpen mi estupidez, ¿cuál es su efecto? ¿Por qué? ¿es en serio? Lo veo leyendo en varias partes

 

[Spookybah]

it's a law of attraction thing. Wolffs law doesn't apply to your long bones.