i smoked DMT during the peak of my first LSD trip. the experience was very intense, and the effects of the DMT lasted much longer than normal. normally when i start to come down from a DMT trip, i start to realize that i had just smoked DMT, and then there is a little afterglow, but most of the visuals and main effects are gone by the time i'm able to start walking/moving again.
on acid though, the effects of DMT lasted so much longer, and it was like the DMT experience was magnified. it was probably the most intense trip of my life. it was like someone turned off the volume and i couldn't really hear anything except for that hyperspace zing you get, and the scenery around me was transforming and pixelating (if that's even a word) at a much higher frequency than what the speed of the fractals normally travel at. i was walking through my house after i came down and everything was completely different. the clock on the mantle was not my clock, my phone was not my phone, and my hands were like very small, almost like midget hands, and my fingers were short and fat. it was tripping me out so hard, and i actually started to become frightened that the rest my acid experience would be on that level of intensity. luckily though with time i returned to the level i was previously tripping at. it's hard to convey everything to you exactly, but it's definitely worth trying.
definitely be prepared for a very intense experience, and there will probably be a lot that you forget. i only remember a good portion of the blast off and when i started to come down a little. i remember bits and pieces of something very intense happening, but it's all very vague. at one point a lion was somehow involved, but it's hard to remember. it's like i was in a different dimension.