Snake following me

Last night, i saw a snake(snake which has something in the tail) , it was gathered into the the in its tail(i'm forgetting words to write, i am not native English). Then it jumps and follow me, it want to bite me, i was running, i was so scared. Then running i reached to me friend's home. He was not at home. I was trembling there. Snake didn't reached there. I was waiting for my friend.