I had an old Pontiac, did the same. Must have been a GM thing..................
my old 55 ford truck could do it on cue with an accelerator press and release... when my immature friend found out, he kept a toy gun in the glove box to fire at random...
i was soooo stupid then...
Must have been a GM thing..............
Had an older Volvo backfire at a light, the fuel lines were not fireproof...electric fuel pumps, pump without the engine running! LOTS!
Not an unusual occurrence.
Happens all over France, all the time?