I had a motorbike accident June 8 and surgery June 10, 2014. Titanium rod and screws. Have been doing regular exercises as per physio therapist and now FWB with 2 crutches about to move to a cane in the next week or so. My question is that about a week into FWB my knee makes a lot of crackling sounds while straigtening fully. No psin to dpeak of and not sure if it is only my mind that feels irritated by the sounds! Anyone else experiencing this or know whst this could mean? Is it common? Thanks for any help.