Manning, seeing what was happening, thought for a moment that the Giants should decline the invitation to score, run another play to wind down the clock, and then kick a field goal.
Fly-half James Hook directed play in the driving wind and rain at Galway's Sportsground, landing a penalty before his delightful chip made Walker's try.
Monday's action was very nearly over almost before it began as two golf balls moved on the green due to strong gusts but the wind subsided and play continued the rest of the day.