Your initial impulse will be to overcome difficulties as swiftly as possible.

So, forgive my initial impulse.

Projectiles produce an initial impulse from the muzzle blast with a shock wave traveling radially outward perpendicular to the path of the supersonic projectile.

The initial impulse was to be heard above the noise of lively rent parties.

As it travels outward, this initial impulse forces the wire out of its resting position all along its length.