Clarification on blind transfer

Hello,

I need some clarification on this point:

2.3.7.1 Blind Transfer
With a blind transfer, an attempt is made to connect the original caller with the callee. Any prompts preceeding the <transfer>, as well as prompts within the <transfer>, are queued and played before the transfer attempt begins; bargein properties apply as normal.

As the transfer is modal, a bargein can happen only if we define a grammar under transfer.
But what is the consequence of matching the grammar with a recognition result while the prompt are played? 
What will be the value of the transfer item variable?

Thanks for your clarification.

Arnaud.