Anvils aren't completely immobile. I've lifted anvils in real life (Yes, people still have anvils, it's just not a common household item). An anvil the size of the one he placed on the end of the hammer would be about 100-150 pounds, which is pretty easy to lift. But swinging that on the end of a hammer is a completely different story. Still, though, there are some people on the planet that are strong enough to swing a hammer that heavy. I'm definitely not one of them, though. I could lift it, but I'd never be able to actually swing it.
Still, though, you only asked if I could lift it, not if I could swing it. So yes, I can lift it.