TC large-caliber handgun and the other with a spray can containing a chemical irritant, robbed Morrison's Cafeteria in the 8000 block of Ritchie Highway last night of an undisclosed sum. Police said the men entered the cafeteria around 9:45 p.m. through an unlocked rear door while several employees were cleaning up the kitchen area and preparing to leave. After ordering the employees into the manager's office and forcing them onto the floor, the two men ordered the manager to open the safe and give them its contents. Police said the employees were then locked in the walk-in freezer after one of the men sprayed the manager's office with the chemical irritant. Police said the employees remained in the freezer for less than five minutes before opening the door and reporting the robbery. Police said the two men escaped with an undisclosed sum.