My dad ALMOST walked in on me jerkin' it.
WARNING: THE FOLLOWING STORY MIGHT BE UNREADABLE
It was winter, so I had my heavy blankets on my bed. I was fapping really hard, so it got hot. I take the blankets off of me and continue the fapping session. Suddenly, I hear someone grab my bedroom's door knob (we have those old-timey door knobs that need to be locked with a skeleton key). I pull my PJs up, and sit upright so my shadow would help conceal my boner somewhat. He then comes in the room, grabs his boots, and walks out. I felt like I needed to do a victory fap because I realized how good my ninja skills were.