"The three igloos" joke

There were three Eskimos in Alaska and one time, while they were at
their local bar, they got to talking about how cold it was outside
and how cold their igloos were.
They could agree on everything but whose igloo was the coldest.
So they decided to determine who indeed had the coldest igloo.
They went to the first Eskimo's igloo. He said, "watch this,"
and took a big breath and exhaled. His breath froze into a big
lump and fell to the floor.
"Wow, that's colder than mine," said the second Eskimo.
But the third Eskimo exclaimed that his igloo was colder still. So they
ended up at the third Eskimo's igloo. He said, "watch this," and
went into the bedroom. He threw back the thick furs and retrieved one
of several small balls of ice there. He took the ball and put it
in a spoon & held a match under it.
When it heated up enough, it went, "FFFFAAAARRRRTTTT".