This falls well into the "If you haven't been suspended you're not trying hard enough" category.

I went to an Improv comedy show last evening - the late, late show, where anything goes - and in one of the skits they ended up on a WestJet flight. One of the performers mimmiced the PA anouncement, and gave the in-flight "joke":

Well, it only took 5 weeks, but if finally happened.

I laughed myself stupid.

And if WestJet ever uses it, this guy should get the royalties.