Tiny tower has many things under it
The first thing you might see is a small fossil. Under the fossil, there is soda cans and a bone. There is also a statue of some bitten. Next, there is a broken car. Under the car, there is a plane, which is a reference to NimbleBit's app, Pocket Planes. If you manage to use 2 fingers to scroll even more down, you will see a train from Pocket Trains and a bigger fossil.