i think its more of a personal deal with bud than with beer... most everyone exhibits the same signs when totally drunk, glazed eyes, stumbling, slurring, etc... but with weed, some people can handle a high well enough to pass it off.. i have been pulled over high more than once and never had a problem, but if i was alot higher it might have been... red eyes and marijuana smell are usually a cops 1st signs of weed use... if you can act normal, usually you will be ok...

now if you bust out laughing like i have at the drive in many a time, then you might be in trouble