I see in Matthew 10:8 that the Lord gave authority to the apostles to heal the sick, cleanse lepers etc. (all before Pentecost). Are there any references to them preforming such acts before the Spirit came upon them at Pentecost?
In Luke 10:17, when the seventy came back from visiting the towns in Israel, they said, "Lord, even the demons are subject to us in Your name." They were able to do the things Jesus gave them authority to do and they found it amazing.
The man with the epileptic son initially brought his son to the disciples to be cured. Though they failed, it does imply that they were doing some cures. And it led to a discussion latter by the disciples in Matthew 17:19 about why they couldn't handle this particular problem.