Yes, he got a little aggressive, but I was actually being shared with him by a guy that I saw regularly and he kept it under control. He's the one that suggested I get on top.
I very soon learned that trick...It also stopped them just ramming into me. For some reason those with big cocks liked to do that. Did you find that so too?
When I had a big one like that, I found it didn't hurt if I was on top riding him, and that was the only position I could take the whole thing. He also went slow as not to destroy me.