The grasshopper

Once upon a time, in a land far far away, there lived a pretty pink grasshopper in a jar.


She could jump very high and reach the sky "weeeeeeee!"


Then one day, someone put a lid on her jar.


She jumped as usual but she hit her head "Ouch!"


So next time she learns her lesson and jumps a bit lower.


Then she got so used to it, even when someone opens the jar lid... she still jumps the same height.


So d = capability - reality. d is the potential height wasted.


So little miss grasshopper will never realize her full potential jump-height. Why did someone put a lid there? Poor miss grasshopper...