What I expected to happen was...:
I was trying to use bone meal on a cactus so it grew faster, it didn't work, so i tried throwing the bone meal on. 

What actually happened was...:
When the item (bone meal) made contact with the cactus it was eaten by it/ disappeared on contact.

Steps to Reproduce:
1. Place down red sand.

2. Place cactus on red sand.

3. Use 'Q' to throw item onto cactus. Item disappears.