In general, it's smart to lower your shoulder and go to the rim if you have any daylight at all. Most of the time the defense will be called for a block if there is any contact (offensive fouls are rarely called -- only when you are perfectly set do you usually get the charge call). This is why defensive players "give way" -- it's the best hope you have. IMO the greatest flaw in how basketball is officiated is the strict conditions refs require to call a charge -- offensive players should exploit it more.

Lebron is smart.