The weeds have 'run riot' over our poor garden. [=the weeds in our garden have grown quickly and have taken over the garden]
The field was a 'riot' of wildflowers. [=the field was filled with many kinds of wildflowers]
The news about the election caused/started/sparked a 'riot' in the city.
(..) Call it what you will, Lord Stark, ser, the city is packed with people and more flooding in every day. Last night we had a tavern riot, a brothel fire, three stabbings and a drunken horse race down the Street of Sisters. - Dreadful. - If you can't keep the king's peace, (..)2011 TvShow: Game of Thrones Title: Cripples, Bastards, and Broken Things Season: 1 Episode 4