You didn't just say that number because there's a "76" within our ranks, right?

[That's a Mamoru-version of humor right there.

But he nods.] Keep the number in mind. [The count is slightly high but 70 beats per minute for someone who suffers from claustrophobia in the middle of a trench war isn't that bad.] And this may sound silly, but the next time you count your heart rate and it's way off, try blowing on your thumb.

It's either this or going the long, more exposed path. Depends on what kind of danger you prefer - the one inside your head, or outside.