This achievement is unmissable and will unlock just a few minutes after the scene in Emmett's lab. There is no real necessity for a guide on this achievement. However, I had problems with achievements not unlocking, so I thought it would be nice to have a description of when this achievement is supposed to unlock. I ll put the following in spoiler brackets, just in case.
*** Spoiler - click to reveal *** When you are in front of the jail to free old Emmett, Marty will use the drill to get him free. The achievement unlocks just in this scene without you doing anything in particular.
Here is a video, showing you the particular scene:
( video credit: Spielen wir mal | Pinhead01 )
Hope this helps!
Any improvements, please let me know in the comments below!