Thank you for the message.
Yes, you are right. I applied the time-remapping in this video, but there is a feel in that video effect shows that frames "back and forth" effect in the extreme point of curve. Please check this clip - alone to understand what am talking about from above video.
I would like to know more on this 'effect' used in time-remapping like what its called ? why/when it would be applied ?. Looking forward to your reply
Timing changes like that would be applied whenever it fit the mood of the piece. I've seen a lot of skating and other "extreme sports" videos use time adjustments like that when it fit the music and edit. This sort of effect wouldn't be normally be appropriate in any sort of narrative piece where a story is being told, but in a highlight reel of cool sports action, it's acceptable.
To add to Szalam's comments, I have never seen an instance of Time Remapping where the motion slowly came to a halt. The reason: you don't get smooth ramping of motion with Time Remapping. It is far more widely used for back-and-forth manipulations of short duration, and you don't see the frame rate discrepancies very easlly.
It's also widely used to go instantly to slow-motion or to fast-motion... and this is done by multiplying or dividing the footage's original frame rate by a whole number, and entering the resulting values into Time Remapping.