How can u tell if someone is on acid?!

How can u tell if someone is on acid?

i heard my freind was on it but i want to study her signs before i accuse her is there any way i can tell?

Why do you want to accuse her?

Some signs are feelings of grandiosity...that they can do anything.

or

Being very spacy...not really very aware of the her physical surroundings or people

Difficulty relating to others

or

Looking at something that is not there or something ordinary in a peculiar way (sometimes people see things all distorted, like the table floating, or something like that)