The machine must work, the man must think.
You can't tell ahead of time which side of the sandwich to butter.
The likelihood that a sandwich will fall butter down is directly proportional to the value of the carpet.
The item will fall in such a way as to cause the most damage.
The most fragile part will be dropped.
Any tool, if dropped, is rolled into the most inaccessible corner of the workshop.
Rolling into a corner, he will first hit you in the toes.
When looking for small spare parts that have fallen from the workplace, the probability of finding them is directly proportional to the size of the part and inversely proportional to its value to complete the job.
The reliability of the equipment is inversely proportional to the number and position of the people watching it.
Everything can be adjusted if you turn it in your hands long enough.
A part is stuck - push it. If it is broken, nothing; it still had to be replaced ...
If you damage the car long enough, it will break down.
Push something heavy and it will topple over.
Don't waste your energy, take a bigger hammer!
Experience grows in direct proportion to the equipment disabled.
If all else fails, finally read the instructions.