Yea I agree with Ophie. I have done this little trick one time:

I took off my shirt. That moment while it's halfway off and covers your face? I used that moment to change dream scen, do by the time I got it completely off, i was in another place.. It worked quite well. i haven't done it again though, as i dont see the need to because of other possibilities. But that was a cool experience.

nice dream!