Taller beings are often contained within the ship and nearly always appear to hold the most authority. One taller being usually doesn't leave the ship. Assistants to the doctor may be short or tall, but usually tend to be taller. Less appears to be known about the taller beings who stay on the ship, and certainly the media and abduction stories tend to focus on the short grays. In the majority of cases, abductions are made via a beam of light used for levitation, as a way to get the subject into the ship, whether from the home or by being led outside to walk into a beam.
Beams are often white or bluish white.
Odd factors among light beams appear in several cases where subjects describe dust flecks or particles within the beam. The particles tell me that this is probably a completely separate mechanism for levitation, says Wright. Or, in a smaller number of cases, the subject physically walks onto the ship without observing light beams. Wright has found few predictable patterns or broad commonalities across the database of abductions. However, in addition to the generalizations made here, Wright has been able to make some other findings.