Worst epic science fail you have seen in sci-fi?

[Rhea47]

Star Trek: 
"Lets use the deflector to shoot at the Borg" 
"Lets use the deflector to heal a space creature"
"Lets use the deflector to hack the mainframe"
"Lets use the deflector to trick the orbital defenses"
"Lets use the deflector to manipulate space time"
"Lets use the deflector to collapse the black hole"
"Lets use the deflector to cook dinner"
"Lets use the deflector to deus ex machina all the things"






DEFLECTOR