Great now im scared becalse of this video!!!!!!?

okay so i was waching vids on Youtube and i had it on auto play and turned on this video of sad storys of these gymnasts who go hur and i was just practicly in shock so i just kept watching and i wanted o be a gymnast but now im scared o evean tumble!!!!!!!!!!!!! do gymnast ge so hurt or die often and what are the chaces of me getting killed?!?