You only have to pull the fuel control switch up and over the latch. After that it 'drops' naturally into the cut off position. The right pressure in the right manner and this is feasible. You'd have to be unlucky but that's not unknown in aviation.
About 15 years ago a QF 744 had an engine shut down in similar circumstances. A sun shade had fallen down into that area and the 'notch' on the end (the bit that slots into the rail on the windshield) had fallen between two fuel control switches. As the F/O picked the sun shade up the notch caught one of the fuel control switches and lifted it up and over the gate. As it disengaged it dropped the fuel control switch into the cut off position.