Oh eek LOL
I had a mega high just the other morning. Knew my pump reservoir was running low, and it kept beeping and vibrating alongside me in bed and i just kept shutting it up until I realised it was constant (it normally only beeps when it has 20u left - well that's tomorrow isn't it?, plenty of time ...
Anyway it was about 06.00 and dark so I turned the bedside light on and found me glasses, it said 'Occlusion' (ie blockage). Occlusion my foot, it was completely empty!
It was only then I had a mental picture of the remote being mid-bolus delivery sometime previously, when it had told me it only had 20u left, I just shut it up so I could make sure it had finished the bolus.
And promptly forgot about it .......
Ooops.
Anyway 20 something - thundering headache, nausea, dizzy. And of course, the thirst .....
Unlikely to be as bad so quick on basal/bolus, as there's usually some basal kicking about to prevent the worst symptoms. With me would take two or three days constantly in the high teens before I felt like that (was when I had my nervous breakdown and couldn't control my BG) But forget to take your bolus and you know about it!
If it shoots up very suddenly, I get a 'hot flush' very similar to the sort I had You Can Guess When LOL, was bit tricky when I was having the normal sort of mid-life ones, used a lot of unnecessary test strips!