"The science fiction method is dissection and reconstruction. You look at the world around you, and take it apart into its components. Then you take some of those components, throw them away, and plug in different ones, start it up and see what happens."
- Frederik Pohl

This idea was floating around at the turn of the century; check out these motor roller skates from Scientific American in 1906:

(Roller Motor Skates (1906))

In view of the fact that each skate contains a gasoline motor, carbureter, battery, and spark coil, it will be seen that the whole has been reduced to a comparatively small size. The use of the rubber-tired wheels is found to give a very smooth-running movement. On the back of each skate will be observed the small sheet-iron box which contains the battery and the spark coil. From the box a pair of wires protected by rubber tubing passes up to the leather belt which the person wears, 'and upon the belt is placed the switch by which he is able to make or break the ignition circuit when he wishes to start or stop the motor or to regulate its speed. On the back part of the belt is fixed a small gasoline tank in the form of a flat and slightly curved sheet-iron box.