Thor feels something is wrong with Mjolnir, and in order to test it out, he sends it to Earth and is promptly picked up by Adam Aziz of Arizona, proving Thor right. Adam receives a full costume worthy of Mjolnir and when Iron Man tried to take the hammer for testing, Thor makes an appearance.
Not appreciating his private phone no being written on Mjolnir, Iron Man repeats his request to take Mjolnir for testing to Thor, who declines. Iron Man then tries to fight Thor by wielding Mjolnir, striking him straight in the face with the hammer. Thor lets Tony strike him once before reminding him that he is still a god and not to be refused. Tony, probably remembering the last time he angered Thor, sheepishly acquiesced to the Norse god.
“Do not mistake wielding my hammer for wielding my power. Mjolnir or not, I am still a god. And you… are a tin man in a lightning storm.”
From – Thor Vol. 6 #8