Shih-tou Hsi-chien (700-790) was a very well known Chinese Ch'an master. As a young monk, he was one of the disciples of the Sixth Patriarch Hui-neng. After Hui-neng passed away, Shih-tou continued his pilgrimage...
He paid a vist...
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Spilled coffee on your keyboard? facePalm™!
Heard the door slam as you locked yourself out of the house? facePalm™!
Accidentally insulted the bride at a wedding? facePalm™!
Hit 'send' on an e-mail and immediately regretted it? facePalm™!
Told the wife/husband/girlfriend/boyfriend they could lose a few pounds? facePalm™!
Note: The facePalm™ is powered by unique tachyon energy which is a by-product of the large Hadron Collider. Each undo requires 7 trillion electronvolts. Please do not use near heavy machinery or animal/plant life.
Warning: Hitting the facePalm™ undo button more than three times in a row may damage reality. Please do not attempt to travel back 30 years and change your career or marriage as this may tear a hole in the SpaceTime Continuum.