I joined an originals band 4 days before a gig, with only a cd walkman and an unplugged bass to learn the songs on. We were having loads of work done to the house so were living at the in-laws. I had to climb a wobbly ladder to grab a bass from the spare bedroom, no way of getting an amp and cab down.
The one practice we had was the soundcheck, and it was the first gig in 10 years I'd played.
Nervous?
Hell yeah, I was pooping myself until the end of the first song.