lol...I can't tell you exactly what to expect as the only one of those I've ever taken was the Soma, but when I used to do meth and I would smoke weed/take a downer near the end of the high from smoking a bowl of ice, I would get SUPER fucked up. It's really hard to describe the feeling without using a VERY racist term that gets used around here. With that said, my mind would become really foggy, my eyes would start to get REALLY REALLY heavy as well as my head. I wouldn't be able to think properly, (and granted this was after being up for 3-4 days) I would start to see distortions (i.e. walls breathing, the door going in the house from the garage floating up and down the wall while growing then shrinking), I'd start seeing shadow fiends/creatures A LOT more at this point, etc., etc. I've actually never taking d/l-amp (only phentermine and methamphetamines) so I can't tell you what to expect; just thought I'd share with you what taking downers on top of an amphetamine would do to me lol. Oh ya, and on phentermine, if I had taken it to stay up all night to write a speech or something for a class, if I smoked weed, the same basic effects would happen to me. I think the weed did it more to me than just taking downers.