Algodoo

Amazing gate that can protect against almost anything!
LEFT/RIGHT arrow keys open and close main gate
DOWN arrow key locks main gate
UP arrow key raises/lowers dropdown gate
ENTER/SHIFT deploys handles for manual operation

For fastest deployment, keep thruster off

To open: UP, DOWN, LEFT, UP
To deploy: (UP if thruster is on), RIGHT, DOWN

Feel free to use in your own scenes, just give me credit