Ajaran sesat..or wrong religion...

I seriously don't get what these people are doing..my god..my bro intro me to this video..and I was like laughing my ass off in front of the comp sia..haha..even being in a rock concert wouldnt to tis much extent of head banging and jumping around..haha..watch it and have fun laughing ur assess off fellows...haha...and the music must be turned up loud..then can really enjoy..haha...look at the imam or spirutal leader in the middle of the group..checking things out..see if they head bang properly or not...