What could this dream mean?

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I had a dream that a bunch of my friends and I went to the movies but then all of a sudden we end up at my school and a bunch of goth looking characters started attacking us with chainsaws,knives and arrows and started bashing peoples heads with baseball bats and there was blood everywhere.Every time I would die in the dream it would start all over again.

( i didn’t know where else to post this)