[contingencies]

This is gold. I would add that - to lessen the shock to the other employees when excusing yourself, freel free to cite health-related, personal or simply other commitments. Clearly, a hike up a mountain or a beer in the sun for peace of mind is well overdue, and it's perfectly understandable to describe it under these banners. Just try not to stir others up more than necessary, while following a path you are content with.