In my humble opinion, the very idea of actually conducting a reality check is redundant. If you're wondering if it's a dream, I'd say it is. We don't wonder that in real life. (except maybe the lucky few who win the lottery) If I started doing reality checks during the day when I was walking around awake, I'd be very concerned about my state of mental health. So therefore, I say, at least with me, if I ever suddenly think, "I wonder if this is a dream?" It probably is. Of course, my mind was very kind to me the other night. As soon as I wondered, It very obligingly produced something utterly ridiculous- blindfolded cartoon penguins waddling around my bedroom- to answer my question immediately. I was talking to my brother about the reality checks, and he says, "So you go, I wonder if this is a dream? you decide to try switching on the light but the bulb's blown, and you go, Woo Hoo! I'm dreaming! then you walk straight up to dad and punch him in the face to see what that feels like?" Of course when I heard it put that way it occurred to me that I would never need a reality check when it was actually reality.