He's thinking, "I may have just made the biggest mistake of my life."
What is the green thing in front of the toad on the snakes back? I can't really make it out, but it looks like a salamander or something?
Alfie.
toads are extremely poisonous and the predators know that by heart. so the snake is not stupid enough to eat it, knowing it will die.
some, not all
Oh man...Er, from that angle it looks like the snake is on the receiving end of some non-consensual lovin'