The man buys the snails and goes straight to the pub, where he stops until closing time. Feeling thoroughly refreshed he staggers home and rings the bell.
The wife, furious as thunder, stomps out of the kitchen and throws open the front door. She finds her husband in the driveway on his knees, the snails scattered around him in all directions.
He glares at them, throws out his arm and shouts,
Spoiler: