So what are these Alien Abductions? Here is an interesting analysis of the same:
Most abduction experiences begin with the visual perception of a bright white light in the sky, field, etc or the abductee’s bedroom. Electronic devises 
and cars can start to malfunction or shut off completely. The abductee is paralyzed in some cases, allowed to move only his/her eyes and cannot make any type of audible sounds. One or more aliens emerge from the craft/light, some times seeming to walk through walls and proceed to take the abductee into the ship.
Once inside, the abductee is stripped of clothing and is placed on a bed that resembles an operating or examination table. One or more aliens perform intrusive physical examinations: probing orifices, extracting bodily fluids such as blood or sperm, and taking tissue and egg samples. Implants (believed to be tracking devices of sorts) are placed deep into the victims nose, eyelid, forehead, hand, or foot. Recovered implants have been tiny round balls, or triangular mineral-like objects, some with chemical compositions not found on earth.
The tools used to perform these examinations are unlike familiar surgical tools used by doctors. In many cases, the abductee can’t even describe them.
Communication during an abduction is limited. The aliens do not explain much about what they are doing or why. Communication which does take place from alien to human appears to be telepathic. Victims also report a feeling of being under a hypnotic trance and that they are reading his/her mind. Communication among the aliens is either inaudible by the abductee or is spoken to in their native language. Some mass abduction reports indicate the presence of one or more humans undergoing the same abduction procedure.
After the abduction procedure is completed, the victim is placed back in the same position he/she was before or released outside the ship.
Post Abduction Syndrome
Though some abductees can consciously remember the abduction experience, many can only recall the memory while under hypnosis. Those who are abducted usually exhibit some sort of physical side-effects from the experience known as Post Abduction Syndrome. The most common symptoms are:
- Lost or missing time, can be short periods of time, up to several hours.
- Frequent nose bleeds, sinus pain, pressure.
- Nightmares of the abduction experience.
- Looking at an object and feeling like one is looking at something else.
- The presence of mysterious stains, bruises, needle marks, implants, scars, etc.
- Deterioration of health, loss of hair, etc.
Conclusion
The abduction procedure appears to be highly structured and routine. Skeptics believe that abductions can be fabricated easily due to the vast amount of information available. Also, hypnosis is not a reliable memory enhancement. Instead, it increases the brains likeliness to fabricate. Some believe that a “true” abduction story can only be created by those who have gone through one.