Q. An 83 year-old man trips while walking to the bathroom in the middle of the night. He has been told many times to get a night-light to avoid these falls but he has been resistant to doing so because in his mind "night-lights are for babies". Besides, he has never had any issues from the falls. After this fall, however, he has a nasty gash across his forehead, so his daughter takes him to the ER to be evaluated. After a thorough evaluation (including a normal head CT), he is released back to home but warned to get the night-light. His past medical history is remarkable for diabetes mellitus, hypertension, and atrial fibrillation, for which he takes a variety of medications including insulin for his diabetes, lisinopril for his hypertension, and apixaban (a blood thinner) for his atrial fibrillation. Over the course of the next few weeks, he becomes increasingly forgetful and disoriented, and his daughter finds him, one morning, very confused, and weak. She takes him to the hospital where another head CT is performed, which now demonstrates prominent blood in the subdural space (subdural hematoma). What is the suspected mechanism for his subdural hematoma?