[OmegaZero_Alpha]

I am pretty sure rockets are actually considered into the physics engine, even though they go straight forward. there are even some types of floors that can redirect rockets (some surf maps if you shoot down they won't collide but will slide away slowly, or they hold them in place as mines).

Syringes should be deflectable, but they really aren't physics-based (notice if you shoot them straight up than they will continue into the sky instead of coming back down, even on infinitely tall maps). plus, physics-based syringes would be an abominable lag-fest.