IF I see the snake before I have actually ridden over the top of it, I would normally scream like a girl and run away
In all seriousness, should I see one before I got to it, I would stop and let it cross. No way would I approach it. Especially not a Tiger snake. Those buggers are seriously aggressive. If it is refusing to move I would just go in a different direction if possible, or get off and stomp and make loud noises until I annoyed it enough to leave.