I was recently asked this question by Sean via email, but when I replied, it was not the correct email address. I will post the answer here in hopes that he sees it!

Here's the question: I recently jailbroke my iPhone4 and use the 4.3.5 tethered jailbreak. I went to install an app that required me to reboot but when it did it got stuck at the apple, I then tried plugging it in then starting resn0w and did Just boot tethered right now. This got stuck at Exploiting with limera1n. I have no idea what to do. please help with what you can my phone is basically a paper weight at this moment.

Here's my answer and a possible solution:

Hey Sean!

Don't worry, no matter what we will get this issue resolved as it is not possible to brick your phone.

Could you please try to reboot your phone (by holding down the sleep and home for 10 seconds)

Then re-download redsn0w from our website and try the "just boot tethered" process again.

Let me know if that works for you!