Reese to Papper: Yo Mama!

8/18/2008 4:52 PM PDT BY TMZ STAFF
Why talk about Jake Gyllenhaal or her rugrats with Ryan Phillippe -- the only thing on Reese Witherspoon's mind today in Brentwood was our photog's mom.

She was so sweet we almost didn't notice the love tap she gave the car behind her as she pulled out.