A tweaker can appear normal: eyes can be clear, speech concise, and movements brisk.
But a closer look will reveal the person's eyes are moving ten times faster than normal, the voice has a slight quiver, and movements are quick and jerky. These physical signs are more difficult to identify if the tweaker is using a depressant.
Approaching or communicating with a person under the influence of methamphetamine

1. Keep a 7-10 ft. distance. Coming too close can be perceived as threatening. He might freak out and kill you.
2. Do not shine bright lights at him. The tweaker is already paranoid and if blinded by a bright light he is likely to run or become violent.He might freak out and kill you.
3. Slow your speech and lower the pitch of your voice. A tweaker already hears sounds at a fast pace and in a high pitch. He might mistake you for violent chipmunks, freak out and then kill you.
4. Slow your movements. This will decrease the odds that the tweaker will misinterpret your physical actions though he might think that you are moving at normal speed and he is really flipping out!
5. Don't jump around and say you are going to kill him, this could be perceived as threatning and he might become scared.
6. Keep your hands visible. If you place your hands where the tweaker cannot see them, he might feel threatened and could become violent.(and kill you.)
7. Don't trick him by saying you are the police no matter how funny it might be. He will get very agitated and eat his entire stash!
8. Try not to say things that are too alarming. so things like " The floor really hates you and I am pretty sure hasn't eaten anyone in days!" would really not help the situation at all.
9. Keep the tweaker talking. A tweaker who falls silent can be extremely dangerous. Silence often means that his paranoid thoughts have taken over reality, and anyone present can become part of the tweaker's paranoid delusions as a result he might freak out and kill you.