1 of my colas are almost right on my 400watt hps now what can i do :/ ?

[thenewgrow]

hey man 18" shit do you think i can pinch it right over at the main stock and then tyring it down ? or wil it die of pinch it in the middel i dont know what to do they are 12 days into flower stage and are growing crazy im kinda lost right now i dont know what i can do about it