When Barry is run over by the golf cart, he is trapped on his stomach. However, when Erica comes to save him, he is now trapped on his back. If there was enough room for him to turn himself over, he would have been able to escape from under the cart.
When Pops & Bev are in the living room, trying to get Murray to play the bongos, the screen direction is off. Both Pops and Murray are looking left. The camera should have been over Murray's left shoulder in order for Pops to be looking right.
The plot of this episode revolves around the fact that Murray has no hobbies. However, in episode 6.07 ("Bohemian Rap City") it is established that Murray has been collecting stamps for a long time. Adam sells the stamps in order to enter a toy contest.