How long can you hold your breath?

I'll use a lock that has no key,
Binned you with chains,
That no one else will see..

I'll let the water creep over your face,
I'll send it in waves..
Just To watch you fade away..

How long can you hold your breath?
And you hold me down with you..
How long can you hold your breath?

I'll pull your arms behind your back,
Use myself as weight,
And wounder how long it'll take before you fade away..

[I wrote this to my father.]