I did similar things as a kid, much worse than just falling down. please don't do what i did and bottle up your feelings and hide them from people. it will only make things worse in the end and lead to more extreme ways of taking anger out. i kept it all inside until i was 20 and it all became too much and i ended up the hospital for a week.
16 is hard. im 23 and its still hard. just take it day by day, tell someone how you're feeling, and know that tomorrow is another day