Gosh, there are so many, but "Freeze! Don't move! Or I'll fill you full of.......little yellow bolts of light!" was the start of it for me so I gotta post that one. Or the infamous "Welcome to the federation starship SS buttcrack!" or the "Have we sent the "Don't shoot, we're pathetic" transmission yet?" I could go on and on with these. They're all popularly known as "Crictonisms" now.