Well, for example, there are reports of respectable people seeing UFO's. Buzz Aldrin, Edgar Mitchell, various other astronauts reporting UFO's while they were in space. Sometimes they say (in footage that has come out of NASA) that it is hardly worth mentioning due to the great amount of sitings they have had.
Then I had my own experience. I have talked to respectable people (the kind of people that tell it how it is) and they have seen UFO's.
Then you have the work of people like John Mack and Budd Hopkins who took (I say took because John Mack is no longer with us) actual accounts and experients on the disturbances on the skins of people who had been abducted. Their skins had weird marks and/or had been burnt. Sometimes there is a little rock-looking thing that actually moves inside of the body, the muscle accepting it (though there is no penetration wound in the skin), the thing actually moving away from tweezers trying to remove it during a surgery, and also that radio waves are emitted from this object. Once the object is removed, the radio waves stop completely.
Then you have the sitings
Then you have the footage
Then you have the ancient accounts
Then you have pictures like this, called cattle mutilation, where a UFO is seen over a heard of cattle at night, and the next morning you find this:
http://www.santafeghostandhistorytours.com/cowm.htmlLooking at those pictures, you see there is one ontop of a powerline. How does it get there?
As for the claims of bugs eating away at these things, that is nonsense. Microscopic tests have confirmed that the skins have been cut with something of laser-like sharpness.
Then you have the crop circles. Many people report lights over their fields at different times of day or night, and when they look again, there is a crop circle. This has been reported too many times. Here is some footage:
video 1)http://www.youtube.com/watch?v=8691qfB4KfQ
video 2)http://www.youtube.com/watch?v=sMTj9PyaV-Q
this could not have been edited because there were no computers to do such things in those days at home on farms to edit such things with, nor did the owner of this video (from the 50's) live anywhere near any editing software.
and the list continues long into more paragraphs and links.