Makita AN451 Instruction Manual page 7

On rooftops and other high locations, nail as you
move forward. It is easy t o lose your footing if you
nail while inching backward. When nailing against
perpendicular surface, nail from the top to the
bottom. You can perform nailing operations with less
fatigue by doing so.
A nail will be bent or the tool can become jammed
if you mistakenly nail on top of another nail or strike
a knot in the wood. The nail may be thrown and hit
someone, or the tool itself can react dangerously.
Place the nails with care.
Do not leave the loaded tool or the air compressor
under pressure for a long time out in the sun. Be sure
that dust, sand, chips and foreign matter will not
enter the tool in the place where you leave it setting.
*Do not point the ejection port at anyone in the
vicinity. Keep hands and feet away from the ejection
port area.