The Nunchuk wielding Evan Abrams offers a look at creating a speed ramp with footage using After Effect’s Time Remapping Tools showing how to create a smooth transition between normal speed and fast and slow speed footage.

Speed ramping, the smooth transition from normal speed, to fast speed, to slow speed, isn’t that hard

Time Remapping is a simple concept in After Effects, but if you are not aware of what it is doing, it can be a little confusing. Evan also provides some great tips for shooting footage that would be appropriate for time remapping effects in After Effects.