Right before Banner knocks on the RV door to talk to Sanderson he puts a tape recorder in his back pocket. Later he turns into Hulk and it's obvious it's not there anymore as the pants now are very tight. Later he wakes up as Banner, in an alley where he pulls out the tape recorder again.
At 34:56 at the wrecking yard a blue car is placed in the crusher as someone says "That's the last one for the day" then it's a brown car being crushed.
At 42:59 the car with David is in it disappears before being crushed and the roof has been cut prior to the Hulk ripping the roof off.