Peter heals the lame man sitting at the Beautiful Gate at the temple. The surrounding crowed was in awe and wonder as they saw this older *lame* man walking and leaping with joy. I’m sure these people had heard about Jesus and how he had healed people AND about his death. I’m sure they assumed that any miracles would have stopped. So I can only imagine their surprise when they see Peter and John healing someone. And Peter immediately turns and gives credit to Jesus. The miracle done in Jesus name. This man they killed still has power to heal.
I wonder how well known the resurrection was before Peter started preaching it.