A scary situation unfolded for Whataburger employees and customers after an angry customer started yelling. Police say the customer even shoved a sandwich in an employee's face.The incident happened Saturday morning at the location on Gessner near Hammerly in Spring Branch.Briana Selman watched the whole incident unfold and shot video of it on her cell phone."She started harassing the employees. She started grabbing things and going behind the counter and making her own food," Selman said.