Question about fastbreak foul

[jt_clark]

Hello All,

I play casual pickup basketball games (call your own foul) and would like to get to understand the rules better...

Today I had a breakaway where I was running for a layup at the opponents basket. One of their team members caught up to me and we were bumping bodies as I tried to drive in for the layup. My natural instinct as we were bumping was for me to put a forearm up to give myself some space.

The opponent says I fouled him for pushing but I said he fouled me for bumping me as we were both running towards the basket. He was running along side me and obstructing my path for the layup.

My question is, who is the foul on so I know how to handle this next time?

Regards,

JT Clark
San Jose, CA