[gravedave]

I don't see why a time crunch is an appropriate reason to ask for help. As a junior, there's little responsibility you have to assume w.r.t. the success of the project. If it fails for some reason that may be related to you, you were probably poorly managed. A competent boss would notice that you struggle and give your task to someone else in order to meet deadlines.

[meesterdude]

The thing with rockstars is that they typically don't need the help, and can figure things out eventually. It's not because they've got some ideal that they're trying to fit into that says "real rockstars don't ask for help" because that's totally maladaptive. Rockstars get shit done and don't care what they have to do to get there. And sometimes that means asking for help.