overspeed

 overspeed is a condition in which an engine is allowed to turn
beyond its design capacity.
a momentary overspeed can result in catastrophic failure.
(the consequences of running an engine too fast vary by engine type and model).

overdream is a condition in which a person dreams beyond the realistic constraints
of their circumstance.
a momentary overdream can result in catastrophic disappointment.
(the consequences of overdream vary by personality type and environmental conditions).