that the actor as a person of ordinary intelligence and prudence should have anticipated the danger to others created by his negligent act, and the rule does not require that he anticipate just how injuries will grow out of that dangerous situation. Enloe v. Barfield, 422 S.W.2d 905 (Tex.Sup. 1967); Biggers v. Continental Bus System, 157 Tex. 351, 298 S.W.2d 79, 303 S.W.2d 359 (1957); Hopson v. Gulf Oil Corp., 150 Tex. 1, 237 S.W.2d 352 (1951); Sullivan v. Flores, 134 Tex. 55, 132 S.W.2d 110 (1939). The act of a third person which intervenes and contributes a condition necessary to the injurious effect of the original negligence will not excuse the first wrongdoer if such act ought to have been foreseen. Mexican Nat. R. Co. v. Mussette, 86 Tex. 708, 26 S.W. 1075 (1894); Hoey v. Solt, 236 S.W.2d 244 (Tex.Civ.App.1951, no writ). An act wanting in ordinary care which actively aids in producing an injury as a direct and existing cause need not be the sole cause; but it must be a concurring cause and such as might reasonably have been contemplated as involving the result under the attending circumstances. Gonzales v. City of Galveston, 84 Tex. 3, 19 S.W. 284 (1892); Texas Power & Light Company v. Culwell, 34 S.W.2d 820 (Com.App.1931, opinion approved). The test is not what the wrongdoer believed would occur; it is whether he ought reasonably to have foreseen that the event in question, or some similar event, would occur. And in Biggers v. Continental Bus System, supra, we emphasized the teachings of common experience and practical sense in solving problems of foreseeability in traffic mishaps.
Ordinarily, of course, the question of whether an act of negligence was a proximate cause of the consequences presents an issue for determination by the fact finder. Cf.
Lovell v. Stanford, 386 S.W.2d 755 (Tex.Sup.1965); but see
Texas & N. O. R. Co. v. Burden, 146 Tex. 109, 203 S. W.2d 522 (1947), and Erck v. Zelios, 401 S.W.2d 867 (Tex.Civ.App.1966, no writ), and cases therein cited. Here, however, the narrow question is whether the foreseeability element of proximate cause is conclusively shown in circumstances where the negligent act of a following driver in looking away is a cause in fact of a rear-end collision with a lead vehicle which had been stopped under unexpected circumstances. We hold that it is.
In so holding, we sustain the first point of error of Petitioners which, in turn, requires a reversal of the judgment of the Court of Civil Appeals. In their second point of error, Petitioners attack the judgment of the trial court in its allowance of a credit against the damages found by the jury of prior payments to Petitioner, Harold Clark, by Fireman’s Fund American Insurance Companies, the insurance carrier of Respondent and not a party to the suit. Petitioner does not support this point by argument or the citation of any authorities; he merely cites Rule 39 of the Texas Rules of Civil Procedure. The problem is not one of the joinder of necessary parties within the purview of the cited rule. The judgment of the trial court does not purport to adjudicate any matters requiring the presence in the proceeding of the named insurance carrier.
The judgment of the Court of Civil Appeals is reversed and that of the trial court is affirmed.
Dissenting opinion by WALKER, J., in which GREENHILL, HAMILTON and POPE, JJ„ join.
WALKER, Justice
(dissenting).
In my opinion it was for the jury to say whether, under all the circumstances, a person of ordinary prudence in respondent’s position should have foreseen that a momentary glance to the side would probably result in injuries or damage to himself or others. I would affirm the judgment of the Court of Civil Appeals.
GREENHILL, HAMILTON and POPE, JJ., join in this dissent.