This animatronic "bunraku" hand and rod Puppet had a lot of people convinced this was a fully computer generated character. It was actually some low tech hand puppetry with some well placed rod and green suit removal in post. Some helpful servo eye lids and a pulsating "brain sac" really helped sell our alien as a living, breathing extraterrestrial. Another very effective example of STEFFX " In Camera " puppetry options.