I sometimes have problems with RCs like that, but with experience I've gotten to the point where, if I really feel like I must be dreaming but the RC doesn't want to tell me so, I just keep trying or do other RCs or look around for other oddities until I do prove to myself I'm dreaming. Often, since I usually fly in dreams anyway, I just attempt to fly/float/hover, and that quickly settles it. I think I'm starting to realize that when I'm really that convinced I'm dreaming already, I'm probably needlessly wasting time trying to prove it to myself. :P