Ah, CSI-type shiznit! Tell you what, call you mechanic tomorrow and just be cool about it. "Hey, I was thinking, since there was such a big bang, do you think it could have tripped that fuel pump shutoff switch in the trunk?" Don't go in sounding like that's the problem and you know better, just float it like a theory (because it is.)
But it sounds like whenever the transmission / ujoint / differential broke, the jolt was enough to trip the fuel pump shut off.
1994 Super Coupe ('93 5.0L swap), 1990 Tbird 3.8L, 1982 Honda CB900F, 1972 F-100 SportCustom 4x4, 1970 Chevy Custom Camper / 20