In Canada lawsuits are pretty well limited to actual losses like wages and rehab that isn't covered by your provincial plan. Stress and trauma are very hard to sue for. As for endangerment, well good God, we're talking about a BABY ball here, what endangerment?? Again, the risk of harm with a snake like that is simillar to the risk from a small pet rodent, if that. Cats and dogs are capable of far more harm and no one wonders whether they should get a waiver from a kid's parents before they pet the cat. You definitely ARE responsible for any harm that may come from any animal you own but the risks in the case of this snake are so small and remote that it's not even worth thinking too long about it.
I feel a little light headed... maybe you should drive...