[maple_leaf_eh]

Start with the 5 senses - sight, sound, touch, taste, smell. The humour will keep peoples' attention.

Sight - vision blocks; blind spots

Sound - shouting doesn't always work, except to raise people's blood pressure; squeaky parts are moving all the time, don't become part of the grease they need.

Touch - pinch points; three points of contact when climbing; where to NOT stand inside

Taste - stay in the real world! Don't lick the paint even if you are having an erection just being near a .....;

Smell - diesel exhaust, fumes and smells can be overwhelming;