I understand that this question doesn't make much sense, so allow me to explain.
I have seen many videos, most of them involving sports and cars, where a person/car is frozen, and the object that was frozen is moving somewhere in the video will approach the frozen object and when it makes contact, the object that was frozen will now move with the object in real time/delete itself and the video keeps playing.
I use After Effects and I wanted to know how this is done. If anyone can help, I'd really appreciate it.
I just spent an hour trying to find a video to at least give an example as to what I was talking about and I just can't find one, but I know I've seen it before.