Rooney failed from the spot for the second time this season, and his 10th overall as a United player, as the Red Devils scraped past West Ham to book an FA Cup fourth round tie with Fulham on January 26.
Evidently, Sir Alex Ferguson was not impressed by this latest effort, ballooned into the Stretford End, which added to a catalogue of such failures from his side.
United have now missed more penalties than they have scored this term - the current score stands at 5-4. However, Giggs has been around long enough to know these frailties can affect anyone.
Even United's most lethal predator in recent times, Ruud van Nistelrooy, missed three in succession once, culminating in those lamentable scenes against Arsenal in 2003.
"Players sometimes go through these types of spells," said Giggs.
"Ruud van Nistelrooy missing three on the trot. Not many people remember that but I certainly do.
"The fourth one he stepped up, buried it and probably didn't miss one again.
"Wayne is our penalty taker. He will be disappointed because he is a goalscorer who wants to score goals. But I am sure if we get another, he will take it."
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