If you notice someone on the ground, stop moshing and help them stand up so they don’t get trampled. If they’re hurt, help them to the edge of the pit. If you see someone’s shoe or cell phone on the ground, stop and pick it up. Raise your hand over your head and hold the item up until someone claims it. Other people may be throwing things like water bottles or empty cans, but you shouldn't join in. You could unintentionally injure someone. Some people at the show just want to stand and enjoy the music. Don’t pull in people from outside of the pit or continue to mosh after you exit. Sometimes security or other staff from the venue will enter the pit to help keep things under control. Don’t try to mosh with them or give them a hard time or you could be thrown out from the show.

TL;DR in Indonesian:
Kenali etiket yang berlaku saat berada di mosh pit. Ambil barang yang terjatuh dan pegang di atas kepala. Jangan melempar barang ke dalam mosh pit. Orang-orang berdiri di tepi lubang bukan tanpa alasan. Jangan merasa terganggu dengan petugas yang masuk ke lubang.