When you land on a torch while moving/jumping, it plays a step.wood sound as if you walked on it but you continue falling.
To recreate:
1. Place a torch on the ground
2. Go at least 1 block over and 1 block up
3. Jump on top of the torch while holding any direction key
4. It will briefly play a sound characteristic of a wood block even if the block it is placed on is completely different (i.e. dirt)