Eight Legs Of The Law?

Today I noticed a spider in a packet of grapes imported from Spain. The spider was completely black and looked poisonous so my only option was to kill it. I then thought about what would happen if a dangerous arachnid, like a poisonous spider or even a scorpion, was hiding in foreign food and you started eating with no idea that danger in a small, eight-legged package was lurking round the corner and then WHAM!!! The startled arachnid attacks you, distributing lethal amounts of venom into you, but medical attention arrives quickly enough to save your life. Would you be able to bring legal action against the supermarket you purchased the offending item from? How much compensation might you be entitled to? Would anyone involved in the production of the product in question accept any responsibility for what happened?