No, actually go look it up. It's called Serotonin syndrome. You think I just pulled this out of my ass?
I just did a Google search and what I found is
too much marijuana, along with
too much alcohol, too much nicotine -- and
too much turkey,
can produce a negative effect on the serotonin levels of
some individuals.
As previously mentioned, drinking too much water can cause a number of problems -- including drowning. So I'm sure some individuals will suffer the adverse effects you've described from using too much THC, which is why using too much should be avoided.
One major reason why many people use too much marijuana is under the existing circumstances it ranges from difficult to impossible to know the potency of every batch of weed one buys from a bootleg dealer, or what contaminants it might contain. This is just one very big reason why legalized pot will eventually eliminate the problem of unknown potency, just like legal booze has eliminated the problem of unknown "proof" levels -- which killed a lot of people during alcohol Prohibition.