His injury, on the fastest pitch of the summer, came as he tried to pull the lively Aaron for a third successive six but only succeeded in finding a gap in his modern Ayrtek helmet that will soon be closed by new safety regulations.
Broad fell to his haunches and MS Dhoni called for urgent assistance as India's players quickly forgot the animosity between the sides to ensure that their opponent was not seriously hurt.
A smile on Broad's face as he was led from the field was a sign that he was bruised but unbowed and he later revealed that he watched eight of the nine Indian wickets to fall spectacularly after tea on Saturday from a hospital bed.