What a wonderful machine
The machine I'll be working with (at least for this summer) is 9.4 Tesla. That's incredibly strong - to give you some kind of idea, a 9.4 Tesla magnet is 150,000 to 300,000 times more powerful than the earth's magnetic field (as felt from it's surface). Not to worry though, the FDA limits the scanners used on humans to 3T, a mere 50,000 to 100,000 times that of earth.
You can see examples of items getting stuck in clinical scanners (those used on humans) here. I don't think you could pull any of these out by hand.