In Scream (1996), as Tatum starts realizing the severity of the situation and that Ghostface isn't pulling a prank she says, "Cut, Casper. That's a wrap!" What is the meaning behind this line? Is it referencing something/someone? Who is "Casper" here? Clip for reference

Documentary movies used to depict dinosaurs as bald lizard-like creatures. Whereas according to recent scientific discoveries predators had feathers. Are there yet documentary that has updated creatures appearance with regard to science?