I dreamt that i was being stalked by a tiger? what does this mean?

basically i had this dream where i was in a meadow of trees, so closely placed that you could not see land past the trunks. i zig zagged my way out the trees and eventually found myself on a vast plain of open fields, but with a steep mountain base to the left of me. i walked parralel to the moutain until i turned a corner which lead around the mountain. as i turned the terain became like large boulders which went up and down. in the distance i seen a white/grey tiger, it was about 200 meters from me. we both looked at each other for a brief time. i stood still and it ped in front of me, and away from me. i carried on past him and he seemed miles behind me, so i climbed up another boulder and i turned round and he was right beihind me. he jumped up to attack be but got his head lodged in between 2 boulders and started growling. i picked up a large sized stone and repetatively smashed it into his face. i was awoke by my gfriend who said i was violently shaking in bed? any ideas?