Often what happens with me is that I will win a few games, get a high rating, and then playing people at my new rating I will get whooped and go back down. Then I will be playing people at this lower rating and beat them easily...
Outside of this oscillation I can't say I've had any such bursts.
I've had something rather strange happen to me recently for the second time in just under 6 weeks...
I'm usually around a mid 2100's rated on tactics trainer, but about six weeks ago I managed to hit almost 2350 and maintain it for a few days (while actively using TT during this time). After those few days I started failing miserably and went back down to a mid-high 2100 TT user. But now I've noticed a sharp increase in skill in bullet chess... an almost 250 point increase in just 3 days. I hope the improvement is here to stay, but I know neither if it will nor where it came from.
Has anyone else here had similar experiences?