In Colin's example of meditating about a Celtic cross and asking if it could be produced in a farm near his home, he says that a farmer he knew called him to inspect a formation in a field close to his home, but that he wasn't aware that the field had plants growing in it. So although he knew the farmer and therefore probably knew that his field was close to his house, we're supposed to believe he didn't know there were plants growing in his field, as well as presume that he had no relationship with the farmer who he said he knew. Sift out the hypno-regression, claims of alien abductions, mythology, and the lack of substantial evidence for all these claims, and all we've got left is some vegetation flattened in patterns that remains unexplained.
If this rather poor evidence is meant to be some sort of communication between aliens and us, it's got to be the most inefficient way possible that despite hundreds ( strike that ), thousands of examples have told us nothing new ( other than that many crop circles actually have been created by people ), and conveniently facilitates all these unverifiable claims that revolve around the promotion of books, videos, calendars, websites, and whatever else on the subject. I'm sorry but when all this comes together I do that thing where I start involuntarily shaking my head. I'm prepared to acknowledge that there's not a fortune to be made in the business of "cereology", but don't write a book, go on air to promote it and then say, "I didn't ask to become a public figure" ( 1:10:05 )
The sample testing Colin mentioned where the rationale that because microwaves seem to have been involved in some samples, that such samples could be used to differentiate between the manmade and the "real thing" is unsupported. Specifically, microwaves are controllable and creatable by humans, so how can we be so sure that these effects weren't created by humans? We can't, yet Colin has leapt to the conclusion that it wasn't done by humans, and further implies that because they weren't believed to be created by humans, they must be created by non-humans.
Psychadelic Alchemist's question was really good and Colin's answer that he just doesn't believe humans have the technology isn't reason enough to rule it out. It is entirely possible that humans have technology to create patterns in vegetation using DEW technology from air or space. Therefore it shouldn't be arbitrarily ruled out. It's far more likely than explaining crop circles as alien communication. Plus it just makes more sense. It's even circumstantially supported by his conspiracy theory involving the government being involved in follow-up investigations.
Then there's the Steven Greer comparison, and he's almost coming across as wanting to become the SG of cereology. As for the comment, "We shouldn't throw anybody's opinion out." I ask, why not? No doubt some deserve to be thrown out, that is unless you want to validate witches, transports from Hell, and the like. I'm fine with the idea that Orbs of a certain type ( the NL series ) are real, but seeing one fly out of a cloud one night doesn't mean it was necessarily even alien, or that it's responsible for creating crop circles.
Glowing spots in the air over crops are more likely to represent the focal point of a DEW type weapon than an alien craft trying to communicate with us. These days there are also a lot of remote control craft that can move quickly and perform amazing maneuvers. So nowadays they can't be ruled out either. They may not be able to cause crops to form into patterns, but these glowing objects aren't always seen at the same time as crop circles are formed either.