Strange bird behaviour

Saw this the other day.
A bird alighted on the ground at the foot of some stairs. They were external stairs with three landings. The bird hopped up the stairs to the first landing, made the turn on the landing while still hopping, hopped up the next set of stairs to the second landing, jumped up onto the top hand rail of that landing then flew to the side of the building and clung to the bricks in an upside down orientation. It looked around for a few seconds then flew off.
Hmmmmm.