Trainwreck is one of my favorite strains so far. I wouldn't so much say that it hits you like a trainwreck, but it definitely does creep up on you after awhile. I'd say it takes 15/30 minutes before you realize you're high. Then, it only gets higher from there. I've found it hits me in stages. But, the feeling of relaxation starts about 15 minutes in. I feel it just wash over me in entirety, and it just makes me feel peaceful, happy, and relaxed. Perfect to come home to after a long or stressful day. For me, the smoke is quite smooth. I'm normally a cougher, as I have asthma, so I find smoking is pretty rough - not this. I'm able to take bigger, deeper hits, without coughing my brains out. I've noticed that it takes awhile to fully knock me out, aka get me to a sleep state. Probably within a couple hours? It does knock me out for a good 4 - 5 hours of sleep, where I'll be dead to the world. Haven't been able to sleep longer than that on it so far, regardless of how much I smoke of it. It doesn't make me super ravenously hungry, but I do crave certain foods about 45 minutes in. Something salty, or sweet usually. I normally smoke out of a water bong, filled with ice/cold water. My hubby and I have found that occasionally it can make you feel quite relaxed/frisky at times as well. :)