Who needs Flashget?
Stolen directly from lifeofexile.com, you can easily download all files with a certain extension from a webpage using the shell command curl. Type:
curl -O “http://blahblahblah.com/filename[0-10].gif”
to download all of the gif files starting with filename from blahblahblah.com. Note that the option is “minus uppercase o”, not “minus zero,” which tripped me up, because I forgot that the terminal’s 0 has a line through itt.