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>cops have MUCH better things to worry about than some dudes in a drain. (even if caught you'll just get a ticket if the cop is being a dick)
>stay the fuck out of drains if it rained or is going to rain within a day or two also stay the fuck out of poop drains unless you have a gas meter (friend almost died in one) storm drains are pretty damn safe oxygen wise
>bring multiple lights and batteries
>DON'T GET WATER IN YOUR EYE, i got a horrible eye infection taking this pic
that's pretty much it, other than to remember your way around if you start taking side tunnels and shit.
