Loping off the cola?

OK. I've got a Dutch Passion Isis plant that is about 10 days from finishing. The thing is the top of the plant looks like it's ready right now, but the rest doesn't. Should I trim the cola off the top? Will this stun the plant too much? Will this help the rest of the plant?
In short, what should I do? (I've got 4 more ladies that seem close to finishing but not like the one I'm talking about)

Thanks

yea you can do that .. it may slow the rest up but ive done it without any ill effects