Watson, a steam engine requires immense pressure before it can pull the train. Store your energy wisely.
The fog is too thick on Baker Street, Watson. Halt your carriage; proceeding now invites disaster.
The axle is loose, Watson. Delay the pursuit until the carriage is mechanically sound.
The tracks are fresh, Watson. Prepare your revolver and press forward with calculated speed.
Prevent the explosion, Watson, by turning the gas valve off before striking the match.
Disarm the threat indirectly, Watson. A clever chemist neutralizes the poison rather than fighting the symptoms.
The road is clear and the wind is favorable, Watson. Drive the cab forward; success is mathematically certain.