Your whole body is tired. You’re just dragging yourself through the day and then, in the evening, you’re expected to attend an event for work, with all your co-workers. Missing it is not an option, if you want a job to go back to on Monday morning.
Coffee and the usual perk you up ideas are not helping. Your car is parked in the lot at work, if you could just sneak down during lunch and disappear for an hour or three in the afternoon… surely you would be ok to finish the day and then get through the evening. How do you sneak out yet make it seem you will be back in your cubicle any time?