As the doctor completed an examination of the patient, he said:
- I can"t find a cause for your complaint. Frankly, I think it"s due to drinking.
- In that case, - said the patient, - I"ll come back when you"re sober.
Snails produce a colorless, sticky discharge that forms a protective carpet under them as they travel along. The discharge is so effective that they can crawl along the edge of a razor without cutting themselves.