You'll have to be careful with the "didn't have enough" mentality. When I first tried gear (way back in 02), the quality I had access to was total crap (all base) and easily for anyone to consume a few points of, with or without a tolerance. At the time, I thought that particular gear was as good as it could get, and having a few points at once was a normal thing to do.
A few years later in 05 (as "ice" had started to boom) I had access to some high quality gear that was said to have been "washed". It appeared as very fine very small crystals and had no apparent odor. Since I'd only used low quality gear before, I still had my previous mentality of a single point not being a very strong dose. As such I loaded up a point into a glass pipe and smoked it all, not expecting much to happen.
Within about 5 minutes I needed to hurl badly, I felt body rushes that were almost similar to a high dose of mdxx, and my vision felt completely spun out. I felt overstimulated and couldn't focus properly on anything. I was sweating profusely, but even trying to consume a small sip of water seemed near impossible, with my body feeling completely bloated. Some might say this just sounds like a decent dose of meth but I found it to be quite uncomfortable (especially since I was expecting it to be a mild dose), and the effects seemed to peak for 2-3 or so hours, with another 6 hours of strong feelings.
Despite that experience, I did smoke it many times after that - though in smaller doses at a time (around 20-30mg) so I could gauge the strength more easily, without accidentally having more than necessary. The only problem then became that, when consuming many small doses, there is always a tendency to have "just one more" ... until there is none left. It also seems to turn the most rational of people into fiends.