There are several types of UFOs that one could see.  First, there is the energy orbs that is visible to some individuals created possibly by a God or spirit force.  This UFO moves but at speeds that is normal for aircraft.  Religious purposes may be a reason that this UFO appear.  Second, the mind of some individuals can create color visions while a person is awake and looking around.  In this UFO type, if you move your head, then the UFO darts away at a super high speed.  These UFOs are created by the brain maybe by brain spirits or brain aliens to give you a “perspective of reality” and show you attention for various reasons.  Since this UFO originates in the brain, it is usually not seen by other people when pointed out.  Third, UFOs that are meta physical that is they seem constructed and visible and seen by many witnesses.  This may be a civilization that can be invisible at times but visible and solid seeming to the human witness.  If it darts away too fast, then this too could be caused by a vision especially if others in the area cannot see it.  Third, many UFOs are mere hoaxes from individuals who like to make the UFO phenomenon a joke or are seeking a cheap thrill and attention.  These UFOs are sometimes balloons or devices constructed by humanity or they are simply lies to others.   Fourth, UFO that are aircrafts that are in unusual angles or new aircrafts can sometimes be reported to be UFOs.  If they move too quickly, they too can be visions that an observer is experiencing.  These various types of UFOs do indeed fascinate many individuals and many are lucky enough to see one.  If you do see a UFO, try to understand the meaning of the appearance and reasons why you were fortunate enough to witness it.  Maybe one day the spirits of the UFO will begin to talk with you with voices in you mind to explain things.  Always be positive and open minded with UFOs to learn good reasons or messages that they want you to learn and share.