Confused

This is a song by Just Jack. It is awesome, in my opinion.

The first time I heard it on the radio though, the word, "taxi" was replaced with something along the lines of, "that block of frozen urine dumped by a passing areoplane".

It didn't fit, but it made me laugh and laugh and laugh, all the rest of the way home (which was less than a mile, but it was still highly amusing).

However, I can find no trace of the song with this alternative lyric in it, nor any reference to it during an extensive (yep, 5 minutes again) web search. I am starting to think that I dreamt it. Maybe Just Jack has done a Live Lounge recently and it was that version, or something.