The other night one of my Morgan-Greer cards got stuck in the box. It was the 10 of Wands, suggesting I was oppressed by something. I did the reading, found the 10 of Wands had got stuck, and decided not to reshuffle but to add it to a simple, 3-card, decision-making spread. The oppression card (of rational logic over intuition and psychic confidence) was probably more appropriate to the entire atmosphere than the rest of the reading, which was a bit garbled. However the "outcome" card, the 5 of Coins, was broadly accurate, being the "beggar on a beach of gold" card - perhaps the Oppressive left brain rationalist was telling me that I was stupid to be holding out for my hopes rather than cutting my losses and making a compromise.
It also symbolised my mother, who is one of the most oppressive people I know without really meaning to be, who is influenced by the last thing she reads in the newspapers and therefore oscillates between supporting my hopes and crushing them beneath her heels. The sooner I get out of home and start living my own life the better I think.
In general I have looked at jumpers/stuck-in-the-boxes and take note of them but usually proceed with the reading as normal.