i've had the craziest trips when my synaesthesia really kicked in, like the first time i felt and tasted colors, or this one time when i spaced out and saw the similarity between green and purple that i never noticed, then say them merge into greenish-purple (without becoming brownish or anything like that)! if you guys have no idea what i'm talking about, go here: http://en.wikipedia.org/wiki/Synaesthesia