Closed Pit: Tight, hard to move and hard to breathe. A closed pit will usually happen during popular heavy songs like Slipknot - Duality or a S.O.A.D song.
Open Pit: Generally the worst/best you can pick a target and reach them, throw them across the floor punch them, barge them. There's enough room to just dive about punching everyone still causing little offece (Do be prepared to be hit back...a lot)
songs that will get open pits are the less popular but heavy ones.
Motograter music gathers a lot of open pits.
Circle Pit: The larger or stronger Moshers or Metal heads will run around in an empty circle punching those on the outside of the circle and pushing the runner infront until he either leaves or falls to be trodden on. these will happen on most slayer songs.
Slam-dancing Pits: Created by "Wooble" of Wolverhmapton fame. One hand will be behind back at all times (usually holding your beer) and the other one will be swinging side to side, whaloping other slam-dancers and headbanging to yourself.
Lamb Of God - Now You've Got Something To Die For
Is perfect to slam-dance to.
Piss-take Pits: Maetal heads will enjoy poking fun at the emo music by doe-see-doeing and linking arms and swinging happily...Some even girly-mosh in where they rest their heads on tachothers shoulders and flail their arms madly. this is where you generally ignore themusic and do stupid things while the emo's dance.
Any phisical damage done in a mosh pit should be "handshaked" away no hard feelings, enjoy
"OMFG! Did you see the Open pits at Motograter, some fat guy charged streight throught the middle at me!it was amazing."
"You see me and Wooble slam-dancing? i think we shifted a good few emmo's"
"Total piss-take pit to MCR, was quite amusing."
This usaly includes:
Throwing your arms around to protect your own personal space.
Teaming up with a friend and spinning around so that you can both go flying into the crowd that soon gathers around.
Frantic pushing and shoving to get into the middle of the pit and join in with the singing(but more likly screaming) of the lyrics.
I have encountered three forms of mosh pits, grudge pits(where you pick a foe and dont stop fighting with them untill the music carms down), Open pits(where you can actually move and possibly hit other people), and closed pits(in these you can move very little)
It is not an excuse to try and hurt people but was origionally formed due to heavy metallers trying to release some of the fustrations of life.
Early Punkers didnt mosh, they skanked, pogoed and put stanley knives in each others backs.
"Some tosser took a skateboard into the moshpit. Prick"
"Sucks to be you man."