Spencer Pratt Has Eyes for Heidi's Mom

5/13/2010 7:40 PM PDT BY TMZ STAFF
We're officially worried for Spencer Pratt.  We just got this pic of Heidi's hubby standing in his driveway doing surveillance after they called the cops on Heidi's mom.

TMZ broke the story that Heidi and Spencer called police today after her mom, Darlene, showed up at their house and wouldn't leave. 

Spencer is holding a big-ass piece of crystal -- something he thinks creates good vibes.