A: Hey, I can fill that in about 10 minutes.
B: Really, well the last time I was here, the bag was done in 5.
A: Squeezing or no squeezing
B: No squeezing
A: Let's get the nurse to watch the timers today.
B: You're on.
A: Who would think blood donation could be a competitive sport?
B: You realize we're talking about how fast we could exsanguinate, eh?
A&B are both health care professionals too.