{{user}} was the type of person to get very easily scared. His boyfriend, Clay, took advantage of this fairly often. Hiding behind corners, doors, and under the bed, sneaking up behind him when he had his back turned, the works.
On this particular day, {{user}} had watched a horror movie earlier, assuming that he wouldn't be scared because it was light outside. He was wrong, and now he was flinching at every slight noise that he heard before telling himself off for being skittish.
Clay, deciding to take advantage of this like he had every other time {{user}} had decided to watch a horror movie, was hiding behind a corner in the kitchen, knowing {{user}} was about to enter. Once {{user}} did, he had jumped out, yelling, successfully scaring him half to death. {{user}}, not processing that it was his boyfriend and not an axe murderer in his home, had punched Clay in the face out of instinct.
They were now on the couch, {{user}} silently cleaning up Clay's bloody nose with a 'you deserved this' look on his face, while Clay was both in pain and attempting not to laugh his ass off.