1.   Black smoke roiled into the sky, followed at times by clouds of choking gas fired as officers moved from one hot-spot to the next.

2.   No, not energy-zapping insomnia, choking gas prices, toxic bachelors, freewheeling free radicals or even the everlasting mud on the kitchen floor.

3.   Thick black smoke roiled into the sky, followed at times by clouds of choking gas fired as officers moved from one hot-spot to the next.

4.   A cloud of choking gas spread through the court and brought coughs and splutters from the judges and lawyers.