Unexpected effects of tiredness

Quiet delight - a state of acceptance which only comes when you have realised your main achievement will be not dropping off into a snooze and hitting your head on the desk and to try anything more taxing would be asking for trouble. Inability to judge speed - makes driving tiresome and terrifying all at once. Slightly soft focus vision - feels like living in the most boring porn film in the world with twinkly edges all over and no peripheral vision to speak of. Sudden amusement at everyone who isn't obviously battling to stay awake - their endeavours seem so pointless when the consequences aren't going to come close to a formal warning for being asleep at their desk. With that hanging over you, why bother about anything else...?