To demonstrate oscillation:

1: Place trouble light under car. Be sure to remove guards so quartz lamp is fully exposed.

2: Crawl under car. Make sure engine is warm, and exhaust system is hot.

3: Roll onto quartz lamp

4: Leap away from quartz lamp, driving forehead into red-hot catalytic convertor

5: Scream, fall back onto quartz lamp

Repeat 4 and 5.
Process is stable until pain receptors fail or subject escapes.