A general rule of thumb when smoking a strong strain for the first time, take it easy and give it time to make sure there is no more 'creeper' effect coming round to bite you in the ass. Trainwreck is a BEAST. One of my girlfriends grows the rotten salami stankin' pheno. It's strong and only a couple hits sends me into giggles, and I'm terrified to smoke much more than that!