I am pretty sure this is not supposed to happen...

The airplane was smoking! I am not to sure about Allegiant Airlines.  This was our first experience with them.  The plane was at least 20 years old and made all sorts of strange noisse.  And the cabin filled with smoke...or what they called "condensation" before we took off.  It was so bad you could not see and it was hard to breathe. This cannot be normal.