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.
(..) All the little squares have hardened red sauce in them. What's so funny? Oh, I don't know. Kramer dating your roommate, it's funny. It's a riot, Alice. When do you put the sauce on? Any other time. No, no, no. I like to strain the sauce. And I could really live without... (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2