I've always been taught to quickly come to the calling official and give them my information - for example, "I saw A tip the ball out by the free throw line." It then gives the calling official a chance to change their call, or, perhaps leave it because they had another tip right before it went out that perhaps you didn't see. I will come in only if I'm 110% sure (sorry Chuck
), and I will not ask them if perhaps they saw the possible tip by someone they maybe did or didn't see because perhaps they were straight-lined or did they blink or...oh, never mind - you know what I mean; just give them your information. But from the way you described it, I'm not sure I would handle it that way. I have always been taught in both HS and college to bring you information to the calling official, then let them keep or change the call.