Same here ;-). I've never heard of tipping the beans. If I heard it, I would think it changed the accidental nature of spilling; so of a particularly undiplomatic person I suppose it might be said 'He didn't just spill the beans, he tipped then all over the floor, trod them into the carpet, and then walked bits of bean all over the house.' ;-) But that's not an idiomatic usage.
b