well i was having a dxm afterglow so maybe the nitrous affected it? i was defintely feeling something for a good 20 mins.
I had tanks once and after doing plenty of tank hits I took a ride to a freinds house.. Actually cause there was to much ice on the tank so i needed to give it a rest. anyhoo I was seeing creatures and beings (opposing good and bad) in the TV set.. sort of a after glow feeling ..
Using NOS on a DXM afterglow would defiantly affect the duration of the NOS, hell DXM & NOS is one of my favorite combos
i usually can find them at porn shops and such stores in the back and they sell the crackers too...they are selling them for something quite different than what i use them for but hey they still will sell them to ya you just have to be willing to let the guy selling them to you think you are gonna be sticking a balloon up someones a$$ lol