Gerrit, if one object is example inside other object, and they both don't moving, they actually colliding each other i think. And Blade280891, such event like EVENT_COLLIDE does not exist

i simply use small c_trace to find "you" entity
EVENT_COLLIDE does not exist under those words, but it does exist under different terminology.
The three events are as follows:
EVENT_IMPACT
EVENT_ENTITY
EVENT_BLOCK
EVENT_IMPACT: Hit by another entity using c_move
EVENT_ENTITY: An entity, moved by c_move, hit another entity
EVENT_BLOCK: Hit level blocks
Note that they all require c_move by at least one entity, so it won't work for the problem above.