CARLSBAD, Calif.—Bags of cash fell out of an armored truck and burst open on Interstate 5 in northern San Diego County Nov. 19, sending currency blowing across the roadway and halting traffic in the area while authorities—and opportunistic commuters—collected the scattered money. Two of those who allegedly helped themselves to some of the spilled greenbacks were taken into custody at the scene of the spectacular mishap, which happened about 9:15 a.m. on the northbound lanes of the freeway at Cannon Road in Carlsbad, according to the California Highway Patrol. A witness’ cellphone video posted online by KUSI News showed people who apparently had jumped out of halted vehicles hurrying around, snatching the dumped cash off the pavement. “This is the most insane thing I’ve ever seen,” marveled the young woman who shot the footage. “Someone dropped money all over the freeway.” The alleged thievery of the two initial arrestees—a man …