This shouldn't be too hard of a concept to understand. In front of you are thirty ways to complete the sentence, "You might be in Danville if...", so if you get lost, this is a quick and easy way to find out if you are in Danville.
Why do I even need to say that I don't own Phineas and Ferb?
You might be in Danville if...
1) ... Roger Doofenshmirtz is your mayor.
2) ... a mountain, a beach, a forest, a harbor, a lighthouse, and an alternate dimension are all conveniently accessible.
3) ... you go shopping at the Googleplex mall.
4) ... you see green rays flying randomly across the sky on a daily basis.
5) ... pedestrians occasionally break out into song with no apparent reason.
6) ... it's always either summer, Christmas, or Halloween.
7) ... pop culture updates every eleven minutes.
8) ... you have vague memories of being a pharmacist.
9) ... Gitchie Gitchie Goo means that I love you.
10) ... you've met a Fireside Girl.
11) ... you have the imagination of an eleven-year-old.
12) ... the only thing that's impossible is impossibility.
13) ... you've seen advertisements for LOVE-MUFFIN.
14) ... you were a candidate to be the Rutabaga Princess.
15) ... you are a proud owner of Skiddley Whiffers.
16) ... you tried all twenty-nine varieties of meatloaf-flavored ice cream.
17) ... your New Year's resolution was to obey Heinz Doofenshmirtz, your new leader.
18) ... you forgot A-G-L-E-T.
19) ... summer belongs to you.
20) ... you've ever eaten at Slushy Dawg.
21) ... you're an avid fan of Horse in a Bookcase.
22) ... a couple of kids designed your local water-park.
23) ... you've seen an animal in a fedora.
24) ... you've seen a teenager crying for MOM!
25) ... you met someone new every two seconds once.
26) ... you've ever gone to a midday scrapyard raid.
27) ... you find jazz hands offensive.
28) ... meap.
29) ... ou-yerb ave-herb poken-serb ike-lerb his-terb.
30) ... there's a sign saying, "Welcome to Danville," you must pass on the way into the city.
Additional note: this is an ever-expanding list. For every thirty I come up with, I will post a new chapter.
Additional additional note: If you can think of some ways to determine whether or not you are in Danville, let me know and your suggestion might make the next survey.
Additional additional additional note: I bet you never thought you'd see the word 'additional' three times in a row.
Additional additional additional additional note: I'm just copying-and-pasting the word 'additional' now.
Additional additional additional additional additional note: ~Review! If you please.