Some operators of types like the MD80 back themselves off the gate using reverse thrust or at least they used to in the US
A little bit surprised at this statement as because the reversers operate in the vertical plane its going to be stirring up a lot of FOD that is likely to end up in the engine intake.
On aircraft like the 727 or Falcon 50/900/7x using the centre engine where the reversers operate in the horizontal plane you wouldn't have that problem