Animated mesh warp cage. Something like a magnifying glass moving over any object that can stretch or warp an image. Similar to the bulge effect in after effect.
Magnifying glass effect, flat tire rolling on surface. warp effect of blackhole across space. Its one thing to smart mesh a still object, but to mesh warp an area across the canvas is another challenge.
You can do that with pin bones or mesh , look for tutes. Here's the simple pin bone for starters. Make a pin bone flexi bound to your layer go to frame one and scale it up, boomshanka. You can do the same with mesh and get a better fisheye bulge. When the layer moves UNDER the pin or mesh to get that distorto effect . Try dragging the layer under it.