well u do need a sence of wat ur doing
dont think u can just pop off a jump and pull a back 360
injurys can vary depends on what ur doing
i have experienced everyhting from concusions to bruised tail bone (thats very common and it hurts) ive also screwed over my hands but it all depends on what ur doing
more than likely if its harder u can get more hurt doing it but then agian i have seem kids break limbs just jumping
but to answer ur question yes there are injurys some serious and some u shake off by the end of the day
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