Weird Smoke Coming from Stock Pot on Stove
Did the water from your pasta overflow the previous times you cooked? If water from cooking pasta spills and then dries, the residue left behind after evaporation can smoke or even burn. Alternatively something could be stuck on or under the burner itself, and it can be hard to notice depending on the type of electric stove. For example on my ceramic cooktop it's hard to notice residue stuck on the burner unless I look at it from a really shallow angle to get light to reflect off of it.