Battle of Hastings - Norman view part 1

The transcript describes a battle scene where troops move into position against the Saxons. The Saxons stand firm behind their shields, shouting and banging. A juggler entertains the troops before the battle begins. As the battle commences, archers advance and shoot arrows, but cause little harm. The infantry marches up the hill but is beaten back by the ferocious enemy.

How did the heavy infantry perform during the battle?

What can be inferred about the ferocity of the battle?