They say that with fugu, if it's been prepared correctly your toes and fingertips begin to tingle for a few minutes after eating it. If it's prepared wrongly, your toes and fingertips begin to tingle for a few minutes after eating it. Now that's what I call a fun dinner.
And then....
Fugu poisoning brings a terrible death, as the fully-conscious victim is gradually paralyzed--losing the ability to talk, losing use of his arms and legs, and eventually becoming unable to breathe. Death occurs anywhere within twenty minutes to twenty hours.
http://www.mwtb.org/html/201540.html