Caffeine, while not particularly intense has fairly interesting effects.
Generally the most common thing I've observed in myself while taking doses considerably over my usual daily dose was an intense feeling of mania, followed by an extremely heightened pulse and blood pressure and nausea.
Generally caffeine seems to "brighten" everything you see, while also numbing the mind, making things feel less "real".
It's very interesting in how subtle and varied it is in its effects.
>>2032>not brewing your own coffeeAlso, either progressively increase the caffeine intake (bad) or just write up a consumption pattern that takes tolerance into account.