My friend Mark told me his flatmate woke him up at 3 AM, shaking his shoulder. "Dude, wake up. I think someone’s in the apartment." Mark jumped up, heart pounding. "You heard something?!" His flatmate nodded. "Yeah… I think I heard footsteps." Mark grabbed a flashlight and checked every room. Nothing. He asked, "Where exactly did you hear the noise?" His flatmate hesitated. "Actually… I think I imagined it." Mark stared at him. "You WOKE ME UP because you thought you heard something?!" The next morning, Mark told him, "Bro, next time, unless you see an actual intruder, please let me sleep." His flatmate got upset, saying, "I just wanted to be safe. I thought you’d understand." Now Mark is wondering—was he wrong for being mad?