People were terrified when they saw or heard that Ananias had died.

Acts 5:3-6

3 Then Peter said, “Ananias, you (sg) let Satan completely control you [MTY] so that you (sg) tried to deceive the Holy Spirit and us(exc). ◄That was terrible!/Why did you do such a terrible thing?► [RHQ] You have kept for yourself some of the money you (sg) received for selling the land, pretending that you(sg) were giving us all of it. 4 Before you (sg) sold that land, you truly owned [RHQ] it. And after you sold it, you could [RHQ] certainly still have used the money any way you wanted to. So why did you (sg) ever think [RHQ] about doing this wicked thing? You were not merely trying to deceive us! No, you tried to deceive God himself!!” 5 When Ananias heard that, immediately he fell down dead. So all who were there who heard about Ananias’ death became terrified [PRS]. 6 Some young men came in, wrapped his body in a sheet, and carried it out and buried it.