Trying to find the name of this movie but I cant remember. Help?

I'm trying to remember this scary movie I watched a few years back. It was about this group of friends, one of them was a boy who found out about this urban legend where if you sit on a mausoleum  something will push u off.  And they were pushed off I think and there was a crack in the mausoleum that kept getting bigger ?  Idk if this was much help but that's all I cam remember. 

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