What is it like to be thoughtless? Thoughtless is holding no thoughts of any kind, be it words, ideas or images.
Being thoughtless, even for a while, is good for our conscious mind. According to statistics, a person on average have 60,000 thoughts going in and out of the mind. Many are repetitive. If the repetitive thoughts are positive, it is still alright. If it is negative, it is not beneficial to us.
Therefore it is good to be thoughtless once in a while.