Once you have a kundalini experience, you will never confuse it with any other experience. Some describe it as a climax that envelopes all parts of your body, even down to the hair ends and the toe nails.
You may also experience a type of modified 'kundalini effect' after you visit the astral plane (astral travel). The kundalini effect is when you return from an astral travel experience and have a feeling of being refreshed. This occurs because your chakras are closely balanced, cleared, or aligned - not perfectly, perhaps, but close enough to allow the spiritual energies to flow.
You may have all your chakra points perfectly balanced and aligned and still not awaken the snake, however, and not experience the kundalini. This type of kundalini awakening is usually done through your Higher Self willing it to happen. But you may have all your chakra points aligned and balanced, and your Higher Self wishing it, but still the kundalini does not take place. The kundalini experience is not a common experience. Many never experience it in their lives. Some may experience after much training in meditation and subtle energy work, and then, only experience it once in their life time.