I was just on this aircraft today BRU-EWR. Wife and I were in 20 K&L The middle seats in our row were throwing a fit because everyone kept using the bulkhead as an aisle to get to the other side of the plane. There were at least 25 people who either tried stepping over their feet or were stopped by the lady sitting on the aisle seat across from me by saying " this is NOT an aisle!"

Not sure if this is something that happens often... it if so, row 20 in the middle might not be the best choice.