Forgot to mention a T5 amusing one from a few weeks ago. Arrived at the gate after boarding had started, but with no queue we wandered up to the agent at the Tensa barrier checking passports and when she saw Group 0 (2 of us) asked us to walk around the outside of the Tensa barrier to the desk and her colleague would look after us. We did as told and when we got the desk, the colleague looked at the boarding passes and directed us back to her colleague who was checking passports at the Tensa barrier!
So we retraced our steps and presented ourselves (again) to the passport checker who seemed annoyed at their colleague and both just starred at each other across the concourse for a few seconds before we were waved through.

It was Sunday morning, we were in no rush - but was just amusing!

Pilot37