Actually,yeah.Even though I’m a newbie at AE,I can still guide you as to how to do that trick.
It’s pretty simple really.
First,record yourself walking towards the camera in a well-illuminated empty room Make sure you put up a green screen as your BG.
Like,you need to put a cloth/banner kinda thingy which is fixed,plus it shouldn’t have a lot of folds.Kinda like a clean green BG.[Light screen]Well illuminated too.
Okay.now you’re done recording yourself walking towards the camera.
Next,
Record a video of the street with the moving cars of stuff.
Oh,and make sure you record with a high MP rated camera,cuz higher the MP,better the quality.
Now you’ve got 2 videos.
Open up After Effects,create a comp[Named WALK IN THE STREET].Drag the green screen footage and that street footage to the timeline.
Now all you gotta do is use a plugin called Keylight for removing the green screen.Key out the screen.The BG which WAS green will now be completely transparent and the effect will look pretty realistic.
Zoom into the camera.Apply motion blur.Mask out the lens thingy of the camera.Colour correct your comp.
Adjust the parameters a bit.Slightly blur out the edges of yourself[GREEN SCREEN footage] a bit.And voila!You’re done 🙂