The power of randomness

Sometimes u when u cry,u dnt noe what ur crying for,u just want to. . .why does this happen?is it because of boredom?or is it more than that?through prsonal xprience,this hppens when u thought of something that cud make u sad,the reason for the sadness isnt clear,so u shed some tear,gettin deeper into the feelin,trynna figure out wats this sadness bout,then u end up thinkin bout it over n over again til u cant think. .wow,amazing