General Anesthetic Puns

1. I asked my blood type ( genuinely didn't know it). When they said A Positive, I mused, "that must explain why I'm such a positive guy.” ( got a pretty good chuckle from those in the room)

2. They realized I didn't need oxygen and hauled the tank out of the room. I uttered, "tanks for nothing!" (got a bigger chuckle)

Not the greatest puns ever, but not bad for just coming out of general anesthetic :)