In the Zordon-era, there was a code that the rangers had to follow. They were to never escalate a battle, among other rules. They were to only fight defensively, which means they weren't allowed to just "step on them". Later seasons don't swear to this code, but it still seems to be a standing rule for the rangers. 188.8.131.52 05:32, May 7, 2011 (UTC)
stepping on a nighlok with a zord only defeats him and comes back to life as a mega monster.
Where's the fun in that?