(By DCist's Sommer Mathis, one of the few official bloggers who is attending the DNC as official member of the state blogger corps.)

Tuesday was Hillary Clinton Day at the Democratic National Convention in Denver. The senator and former presidential candidate gave a rousing speech that most pundits agreed accomplished what she had promised to do: leave no doubt that she is fully behind the candidacy of her former rival, Sen. Barack Obama.

Before the speech, all any journalist trolling for stories inside the Pepsi Center wanted to do was figure out any sort of fresh angle on Clinton they could manage, and all any delegate or guest wanted to do was to get inside for a prime viewing spot before she began. Which brings me to my first lesson of Day 2 of the DNC:

Be Careful When You Go to the Bathroom: Being a member of the State Blogger Corps, I have a seat reserved for me on the floor in the District of Columbia's section inside the Pepsi Center. But after taking a quick break outside to grab a soda and use the bathroom about 30 minutes before Clinton's speech was set to begin, I was denied entry to the floor upon my return. The Secret Service had shut down every access door to the delegate seats, apparently because the DNCC had issued far more floor passes than the Pepsi Center could actually handle. One sympathetic door staff employee told me she was sorry, but that the Secret Service and the fire marshal had just chewed her out for letting someone else inside before me. She wasn't supposed to let anyone else in, "no matter who they are."

I wasn't the only one who got stuck in the arena's concourse. Hundreds of frustrated pass holders sprinted from door to door, only to find the same situation at each one. By the time it was clear no one was getting inside, those left out began gathering around the many TV monitors in the hall to pay attention to the speech. There were so many people stuck outside that it was difficult even to get a clear view of the screens.

A couple more lessons after the jump.