Sounds really cool. I've never gone without sleep that long so wouldn't know if it's the sleep deprivation, or the meds, or the combination of the two. I have a suspicion though that any meds are only going to make your head funnier when you're that short of sleep.
It did feel really cool at the time, actually had happy feelings going through my arms and legs and felt like I had bugs crawling over me at one point (which should be freaky) and I just kept giggling. At one point it felt like I had a mouth full of hair, and kept trying to get the hair out.

Said to my neighbour last night when he came over for a visit, that the only good thing about the sleep deprivation is the happy feelings I get once I start hallucinating. I kept asking him if my hands and feet were purple, 'cause I kept looking down at them and they were purple to me. He was laughing his guts up about it, 'cause he gets bad insomnia too, and he also starts hallucinating if he hasn't had enough. He said to me that his doctor told him that insomnia can't kill you, so won't give him anything to help him sleep, even after 4 or 5 days with no sleep, poor bloke.
I've had sleep deprivation hallucinations before, but only if I get no sleep for 3 or 4 days... Once the hallucinations start, they start and stop every couple of hours until I get some sleep, and I'll swing between being giggly when the hallucinations are happening and normal when they aren't. Maybe the fact that it was 5 days with only 6 hours sleep and no sleep for two days before last night, might have something to do with it. The meds probably are playing up with my brain though.
So glad I got some sleep last night, I felt like a zombie yesterday.
