Maybe Koelreuteria elegans seed pods. Just a guess as I cannot see any detail with the distance shot.

And I do not know the plants growing in Los Angeles.

https://duckduckgo.com/?q=kohlreuteria+elegans+seed+pods&t=newext&atb=v293-7bc&iar=images&iax=images&ia=images

Yes got it! How do you do it? I read that it's invasive. "Even though this tree is loved and valued by many, we cannot ignore the invasive characteristics that initiated its appointment as a Category II exotic invasive...escape from cultivation and naturalize in Texas, Louisiana, Alabama, and Florida." That confirms it. This thing has little trees popping up everywhere. I even saw one growing inside of an old tree stump. I guess it's not really an invasive problem in Southern California since it's too dry and can only reproduce when water is available.