The PSP's analog input is not a traditional stick, but a sliding flat panel; its odd placement originally led to speculation it was a speaker. Concerns existed regarding the practicality of the input (its position requires a slightly asymmetrical grip on the unit to adequately use, with the left hand being lower than the right.) While it is used in the same way as the analog thumbstick of a modern console, the resistance springs are calibrated differently: they are softer, making quick, coarse adjustments a bit easier, but fine-grained ones a bit more difficult.

Recent research has uncovered additional stimulating effects of coffee which are not related to the caffeine. Coffee contains an as yet unknown chemical agent which stimulates the production of cortisone and adrenaline, two stimulating hormones.


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