ive done this twice: once whilst racing a Fiat coupe 20v turbo we were both pretty even (in the wet so wheelspin) upto 80-90 when i went for 4th and selected 2nd! ouch! the revs have never jumped so quickly, right over 8k rpm and i stamp on the clutch "VrrrrrrOOOOOooooOOOOM!!!" , needless to say i stopped racing.
Second was racing a ren 19 16v, coming past easily up a hill in 3rd at 80-90 select 4th and go into 2nd!!! big noise again, clutch in, select 4th and still toast him !! haha. Spoke to the guy afterwards and he said he heard it! That poor engine of mine has taken some real abuse and still runs very well.