a 1.45 GB Temp file !!!

while installing Unreal Tournament 3 Demo i had to free some space on my C drive, of course i couldn't find that much to delete but i noticed that about 2 GB are missing somewhere, and i found them in my Temp directory.

the thing that caught my attention: the Adobe Acrobat Temp folder alone "\Temp\Adobe\Acrobat\8.0" was about 1.45 GB (about 7 small files and one 1.45 GB file)

actually i moved the 1.45 GB file to another drive to continue with the installation, i was tempted to delete it but i decided to leave it for a while in case something wrong goes on.

of course nothing wrong happened and i'm able to use my Acrobat normally, surely i'm going to delete the 1.45 GB file.

the question is: why create such a huge file??