My daddy went to Charm Engine in Amish country to get our mower. When he walked by this trailer, he saw a killdeer pretending it had a broken wing.

The killdeer did not actually have a broken wing, it was just pretending. It was trying to protect it's nest, which was near. They nest on the ground, and they have 3-4 brown speckled eggs.

“Look at the birds of the air: They do not sow or reap or gather into barns— and yet your heavenly Father feeds them. Are you not much more valuable than they?”

— Matthew 6:26
Killdeer
Killdeer

So that’s what Happened

If you ever see a killdeer doing such actions, then the best thing to do is leave it alone.