Driving under the influence of methamphetamine?

Question by Press Your Luck: Driving under the influence of methamphetamine?
I was watching COPS one day and a police officer busted someone for driving under the influence of a controlled substance (methamphetamine).

Here are my questions:

What driving patterns suggest that the driver is driving under the influence of a powerful drug like methamphetamine?

What physical characteristics (heart rate, eye movement, speech) suggest that the driver has been using methamphetamine, possibly for the first time?

Yes, I know that drugs affect everyone differently, but please tell me about common symptoms.

Best answer:

Answer by Hello
He was probably speeding. That why it’s called speed.

As for physical characteristics, meth users often have bad teeth and scratch marks on their faces.

Know better? Leave your own answer in the comments!