How do you do weskers dash comboes on Resident Evil 5

Press L3 and R3(the analog sticks) down at the same time to do an attack you can press the shoot button while dashing to get wesker to do a jump and knee an opponent in the face how ever you have to time it right and doing this attack will stop the dash how ever the dash requires health to pull off so it won't work when health is low and the dash only last a short time.