Seriously, is the dinner totally ruined though? From what I've seen, pasta can take a good amount of salt before it's actually bad. I just use a small spoonful, not the whole shaker, and it usually works out. Taste the water first, that's my go-to move. If it's too strong, a quick rinse or some plain sauce can save it easy.
Totally get that panic lol. Last time I overdid the salt, just tossed in some lemon juice while it was still hot. Actually balanced it out pretty well.
@maxm35, I've had pasta turn out way too salty even with careful measuring. Once it's oversalted, rinsing just makes it soggy, and plain sauce doesn't always cover it up.