Actually you do, especially behind a large heavy airplane like a 747 headed to Japan. But generally, the vortices will sink to the ground. The 747 likely had a longer take off roll and a slower ascent, so the vortices, in theory, should have sunk lower to the ground than the normal flight path of the Airbus (unless they are such tugs that they climb poorly). Anyway, the point is simple: airliners hit wake turbulence all the time. It shakes and/or rolls the aircraft, the pilot corrects, and you keep going.