Noted conspiracy loon Alex Jones held a pro-Trump rally in Cleveland on Monday -- and as you can imagine, it drew a lot of people who believe some pretty far-out theories.

For your entertainment and horror, we've collected photos of some of the most insane conspiracy theorists who attended Jones's big gathering.

Let's start off with this gentleman, who believes that 9/11 was an inside job:

10 years ago, it was impossible to imagine that a 9/11 Truther would come out to passionately support the Republican nominee for president -- after all, this conspiracy rests on the notion that Republican President George W. Bush and his administration orchestrated the September 11 terror attacks on the Pentagon and the World Trade Center.

Given Trump's own embrace of conspiracy theories, however, it shouldn't be all that surprising.

This sign wants you to support Trump and to know about the chemtrails that are being emitted by commercial airlines that are slowly making us susceptible to mind control.

Yes, this is a real conspiracy theory.

This guy, meanwhile, has a lot going on:

His sign features both an Islamic crescent moon and a Star of David (no, it's not a sheriff's star) next to Hillary's name. The implication is that she's under the control of both Jews and Muslims.

For good measure, he also has a bumper sticker on the sign informing us that fluoride in our drinking water is slowly poisoning us. This is an oldie-but-goodie conspiracy theory from the 1950s that was promoted by the John Birch Society and famously lampooned in the classic movie Dr. Strangelove.

And finally, this shirt isn't promoting a conspiracy per se, but it does promote militias and it's signed by Alex Jones -- so it's a good bet that its owner dabbles in conspiracy theories of one kind or another.