Eggs were thrown from a moving car in Stroud.
The incident happened at around 10pm Saturday December 22 on Stratford Road.
A man was walking with a woman along the road when an egg was thrown from a silver Ford Fiesta, it has hit him in the stomach and winded him.
The car, which had the partial registration 59, has then driven off towards Stroud.
Anyone who witnessed this incident or who has information that could help the investigation should call police on 101 quoting incident 500 of December 22.
You can also remain anonymous and contact the charity Crimestoppers on 0800 555 111, or via www.crimestoppers-uk.org. In some cases Crimestoppers offer rewards of up to £1000 where information leads to a conviction.