There has been lots of infantry charging these last few days. And it is what i like the most with battlefield 3, you can get down a remarkable amount of enemies before getting totaly out of reloads. I tend to sneak around the enemie, there is lots easier to bash them from behind. What many people forget when youre charging is the efficiency of the pistol. The pistol easily takes out four men if you play hardcore and got som kind of aiming. In BF3 i think hardcore is a game setting that is pretty much needed, makes the game more fun when the enemies actually dies. Before charging, always see that you have your gunz reloaded, health at max and concentration at ultra.
Anyways, when coming from behind a bunch of enemies, first throw your grenade, then try to cap those guys that gets your emediate attention, then go for the confused guys, empty the pistol, and when thats done, go crazy with the knife. Thats how i tend to do it and its quite fun when you get +5 enemies, a whole squad and some more. Remember to always aim on the heads if possible. If you have to reload, see to that you have some objects protecting you and keeps you safe, its often that you tend to get shot while reloading. So always hide or hide behind a corner while reloading. If you getting attacked during reload, always try to take your gun pistol, thats alot faster.