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Why does our blood pump with excitement when we feel the sudden surge of power propelling us forward. The quick change in speed, as we accelerate forever (seemingly) forward until terminal velocity...whereupon:

In that instant, intent only to reach the horizon. To go on and on without ever stopping, towards the infinite end of light's pathway.
As we rush towards the point where parallel lines meet, devoid of thought...absorbed in that existential moment where speed is all that matters.

Engrossed in the infinite meaning of NOW. Those inconceivable fractions of time that we call MOMENT, that is inexplicable, but which we all experience and feel for different things in our own way:

If it be the speedy dribbling past multiple football opponents to score the perfect goal
If it be the exhilarating moment when you cycle down dangerous terrain at intense speed
If it be the perfect sniping headshot in a game of search and destroy in Call of Duty
If it be the last step you take to cross the line in a 100m sprint to arrive barely before your rival
If it be the instant at which you see the perfect blossoming of the Sakura trees
If it be the beat change at 6:45 minutes on 'Strobe' by Deadmau5
If it be the frame at which the climax of the film is shown
If it be the second you stop after a long marathon when the dead alive feeling takes over
If it be the conception of the perfect idea to solve a complex problem
If it be the realization that the screen will go black before you see the outcome of the spinning top in Inception
If it be the slow motion of a golf ball bound for the hole-in-one
If it be the solution to a system of numbers in mathematics
If it be the heart pounding moment when fear grips you in a horror movie
If it be the split second you maneuver to avoid hardcore collision
If it be the exact fit of a gorgeous high heel shoe you've been dying to try
If it be the sensation of gradually increasing to Mach-3 speed
If it be the sudden tightness felt on your foot when you pull hard on your football shoe laces just before a match
If it be the 4.5 G-Force feeling precedent of a sudden drop down on an amusement ride
If it be the flipping of the last card to reveal your perfect Royal Flush
If it be...

Any moment in our perceivable dimension, at which our minds reach for singularity, where past and future are non-existent and the worries associated do not exist.

 A perfect instantaneous moment...