Why did the bicycle fall over?

Because it was two-tired!

I'm a baker, and I'm feeling crumby today.

So I was at the beach with my kids, and we saw a guy selling shells. He had all sorts of shells, from big conch shells to tiny clam shells. My kid asked him how he managed to collect so many

and he said it was a shell of a job!

I took my dog to the vet and they said he had a bad case of 'ruff' breathing.