If it's on level ground then it's probably not necessary to rock it back and forth, but if it doesn't work give it a try anyway.
The OM says to turn the key to OFF and remove it, set the parking brake, then press down with the screwdriver. You may or may not need to pull on the shifter at the same time.
You can buy a jump starter or a plug-in battery charger with 50 amp start mode for less than $75. A wise investment if you ask me.