I see this advice: If you mess up don't stop, keep playing all, over this thread. Which I believe is wierd due to the fact that I would give the advice: if you mess up take a mikro paus and then simply "jump" in to the song.
It is just taste, no right or wrong. Just saying that it may be worth trying.
I understand the idea here. But just think of it from the audience' perspective a moment... they're not really inside the song like you are- they're not playing it. In all likelihood most of them aren't musicians, they're just folks getting their kinks out, steam-letting, having a good time. That's all they're paying attention to.
The bass has this strong, low, authorative sound, very rhythmic, bumping it along. If you take that away from someone who's
dancing away on top of it, well, consider that they've learned by this point in the evening to depend on that strong rhythmic bump. It's become their dance floor, metaphorically speaking. If you take it suddenly away for a moment, you've pulled the floor they're dancing on right out from under them.
"YAAAAAUUUUGGGGHHH!!!" they say... "Whoah! Okay, we're back..." (you started playing again).
That's cool if you
want to do that- Phil Lesh says some pretty cool things about that kind of toying with the listening/dancing audience- but if you're doing that to try and get yourself back to where you belong in the tune, then you've done two things:
1) You've messed with somone else's good time, and
2) You've given away the fact that you got lost.
Letting the bottom drop out is pretty much to be considered a cardinal sin, generally speaking, for a performing bass player. I've done it though, and if you can integrate a correction into the figure you're supposed to be playing, well god blees ye! In fact that's the point of not stopping! And it does put you under a certain kind of pressure to get it figured out in a hurry!
Any way you choose to deal, if you're relaxed and not befuddled by your micro-error, you'll just step back in without anyone noticing at all. Except maybe the drummer...