Why did the bicycle fall over?

Because it was two tired!

I told my wife she was drawing her eyebrows too high.

She looked surprised.

So I was at the beach with my kids, and we saw a big sandcastle that someone had built. The kids were impressed by how tall it was, and we started talking about who could have made it. I joked that it must have been a professional builder, and then I saw the sign next to it that said

it was a 'castle' in the sand, built by a 'grain' architect

I'm reading a book about anti-gravity.

It's impossible to put down!