Your Thoughts Please

[golfdesigner]

We have a spot throw-in along baseline in A's backcourt. Spot is about 7-8-ft from sideline. I am T at division line getting ready to head down court to be new L-- A1 calls TO. Partner grants TO -- after TO A1 is ready to inbound ball at original spot -- Partner administers throw-in -- A1 takes about 5-6 steps toward lane before releasing ball--I recognize this as a throw-in violation--partner is silent on whistle at first, after ball is inbounds and about at FT line in BC hits whistle and signals violation--He got it right--
My question, when one is 50-ft from the "violation" is there any good way to "get" this one if your partner doesn't get it--I am glad he got it 'cause I wasn't sure what I would have done if he hadn't. [partner had many years seniority on me].

Comments welcome.