Light therapy (such as from exposure to the sun or another bright light) may also help get you back on track.

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Guests who walked in at The Armory were bathed in a bright yellow light through a huge sun, an installation inspired by the artist Olafur Eliasson.

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"I was smoking outside the door when I looked up at the sky and suddenly the sky lit up with a bright light and something that looked like the sun fell somewhere to the south of Yekaterinburg, " wrote Sergei Bobunets, quoted by AFP news agency.

BBC: Russia meteor eyewitness: 'Something like the sun fell'