I made a similar mistake last month. I had already filled my stomach with a very healthy, low carb salad and one hard cooked egg. Instead of shooting the 16 units of Lantus I had intended, I shot 16 units of Humalog right before going to bed. Thank the good Lord i realized my mistake right before the low hit me. I have to say that was the most bone jarring, teeth rattling low i have ever had,. i don’t want to do that again. I got me up to 120 and kept checking my blood sugar every 5 minutes for a couple of hours. Well actually for about an hour, then every 10 and then every 15 until I was sure i was going to be okay. But then I was afraid to go to bed. That was a rough night for me. I still don’t understand how I made that mistake. I am always so extremely careful and never have them both on the cabinet in front of me at the same time… so, I really agree with you. Geesh-----some days.