lucid problem

last night I went to bed like normal but I musta had like 5 dreams that I can remember but on the 2nd one there where theis bikers and I found it odd that they where dancing so I did a reality check and woala I was lucid (for less than a second) and then everything was flashing and stuff then in the next dream it was completly dark then stuff started blurring in and then I did anotha reality check and I became lucid same problem though it lasted about a second then it became black and I couldn't open my eyes or wake up... then I woke up... it doesn't happen often but anyway that's what happend...