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Old Aug 13, 2016, 02:29 PM
Unrigged64072835 Unrigged64072835 is offline
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Member Since: Oct 2010
Location: Under the noise floor
Posts: 18,579
I can tell when I'm tired because my eyes feel heavy and I can't stop yawning. Usually when I yawn my eyes also get watery. Sometimes my head will droop either forwards or backwards, depending on how I'm sitting.