At the first consultancy I worked for, my supervisor/ senior consultant was an old bachelor, about 60-65. He had never looked after himself and looked about 100. When typing at his computer desk, he'd just fall asleep mid sentence. His head would start lowering as he drifted off. He would sleep for about 5 mins, then jerk awake and continue typing. 15 minutes later, he'd fall asleep again. This would happen all day. One of my good friends working the same firm, at the desk opposite him and would always email me to watch him.
At the same firm, we always had a group morning tea every Friday. The old guy would touch like five biscuits before choosing one to eat. Lots of food crumbs would also fall out of his mouth as he ate. He was also a keen sailer and managed to turn every single conversation into a conversation about his boat. No matter what the original topic of conversation was, he could always link it to his boat somehow.