Not medical advice: You cannot get stuck in a lucid dream. More than 1,000 years ago Tibetan Buddhists began practicing dream yoga in order to achieve a purer form of consciousness through awareness when dreaming. Most people report being able to wake up on demand from these dreams. Others use them to wake up from nightmares.
The danger with lucid dreams is the potential to confuse them with reality. Confusing dreams with reality is a sign of mental illnesses such as schizophrenia.
To check if you are awake or dreaming in a dream read any numbers or letters you might see. Look away for a moment and then look at them again. If you are dreaming they will most likely change or appear oddly.
Recent research suggests that alien abductions are actually lucid dreams or hallucinations. Between hundreds of thousands and millions of Americans believe that they have been abducted and subjected to psychological and physical tests.