Timeout question

[zm1283]

BJV game. V team has ball in their front court, I'm Trail in front of their bench. V team releases a shot. As the ball is hitting the rim, their HC is requesting a timeout. V player catches the rebound maybe one second after he is requesting the timeout, so as he gains PC, I grant the timeout. Coach flips. Can't figure out why I would grant a timeout since he "Only wanted it if it went in". I told him I can't read his mind and since he requested it, I granted it when his player gained control. I told him that if I didn't grant it and he still wanted it, he would be upset too because I didn't give it to him. My partner said I handled it right. Any thoughts?