Galway really shot themselves in the foot early in the second half against Mayo.
Aidan O'Shea powered his way through the Galway defence but lost control of the ball. Tribesmen goalkeeper Manus Breathnach attempted to make a clearance but instead kicked straight at Finian Hanley. The ball rebounded off the Galway defender into the back of Breathnach's net.
Here's another angle.