I like to drink coffee and could drink it all day long when I was in the service. The blacker the better was my motto. Now I drink a half caffeine blend from folgers and have from a few cups to a pot throughout the day. Well my beautiful bride accidentally bought some full strength coffee and neither one of us realized it. OH GOOD GRAVY!!! I thought I was having a combination stroke/aneurysm/seizure!!!! I felt like I'd just driven on the rumble strips up and down a roller coaster with my eyes closed for 12 hours straight while sitting on a finish sander after eating a pound of bad cheese on top of stale beer. It lasted about 2 hours. Apparently caffeine and I are NOT on very good speaking terms anymore. (Sigh)