1. As fire said.
2. When I make a great kill (One example was Wood VS Iron[I used tactics
] and then , you are standing there and someone with say fists , kills you. It happens all the time 2 me. Such as when on map three, I was at corn , I had iron sword & leather chest plate and leggings and a team of three came. One had iron armour (full) and a diamond sword, another the same and the last had iron armour & Iron sword. I was up on half a tree root and the one with Diamond sword & Iron armour came up. I killed him and ran. Then the next with the same gear came (Note; I did not pick up the diamond sword, I had a full inv) I bow'd him twice then attacked him (I was now on five hearts) . I killed him but he hit me. I regenerated 2 two hearts and was then bowed (With one shot) by the final one - I was SO annoyed.