![James O'Brien's Mystery Hour show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/061/053/small/james-o-brien-s-mystery-hour.jpg)
Summary: how do you build a house on a slope, how high can fireworks go, does an aeroplane become lighter after food has been consumed?
Summary: how do you build a house on a slope, how high can fireworks go, does an aeroplane become lighter after food has been consumed?