OBS call and aftermath

[DTQ_Blue]

I had a rec game last week as BU. Kid steals 2B, F2s throw goes into CF. As R1 tries to quickly pop back onto his feet and round 2B, F4 can't get out of his way fast enough and there is some momentary body contact. I verbal OBS and put my left arm out. F8 has the ball quickly, and R1 never had a real chance to go to 3B, even if there had been no OBS. However R1 looks at my left arm extended, which of course is pointing at 3B and casually starts to 3B. The defense is looking at me like I'm nuts, but never makes an attempt to tag R1. After R1 reaches third the coach of the defense is on the field saying that his F4 wasn't trying to "interfere" with the runner and I said "Coach, I never awarded him third base, he took it on his own."

Any comments on how I handled the play. My thinking is if you see OBS, you call OBS in case you later need to invoke protection of the runner. I never thought that a DDB signal with a closed fist would be taken as telling the runner to advance a base.