A short animation found on the third PAL-UK disc of Serial Experiments Lain anime. Each disc has its own snippet.
Source: https://mega.co.nz/#!uhIxwTwK!cO5psgOoaPWcnfILhUwu5UNYqU509NjCmfHqpegIiL0
This one seems to be parodying/referencing old Macintosh "hello (again)" ads.