Avengers Info:

So this article contains massive spoilers for the movie. If you have not seen it yet, turn away now.

Last warning.

OK, so in case you didn't notice...there was a scene in the Avengers that had the team heavily bickering with each other. It took place just after Black Widow found out that Loki planned to use the Hulk to help him throw shit at the proverbial fan. Everything was really heated, and everyone seemed to be affected by SOMETHING.

Loki's staff was glowing, and that seemed to be the cause.

But let's take a closer look at Loki's staff, and why maybe THAT would have affected everyone in the room:

Looks like a BLUE GEM in that staff.

Who gave Loki that staff?

Thanos, right? Well, what is Thanos ultimately interested in but the Infinity Gauntlet.

The BLUE GEM of the Infinity Gauntlet has the power over the MIND.

Don't take my word for it, check this out: Infinity Gems

And take a look at this:

This was in Odin's Vault in Thor...