Please help! I only saw a little tiny bit of this movie when I was young and my mom wouldn't let me watch. I think it's early 90s or late 80s. Anywho, it's a desert setting with a large crater, and people (scientists) whoever walk out a little ways and fall through into some tunnels just underground. In the tunnels there is a huge alien/bug thing that stabs them in the neck with a stinger. Please help this has been driving my apeshit for some 20 years.