But I did it :)
It took me a couple of weeks to work up the courage, but I did it. I walked down the hall of Sponge's class and yelled "Spoooonge!" during her class.
This is how it happened:
I was up in lab working most of that day. I came down to my office (which is near her class) to get something and noticed that she was closer to the door than usual - in fact, I was surprised to see her because I had thought that she had something else going on that day and was going to have to skip class. I went to my office, took several deep breaths, and rounded the corner. I scurried past, mouth open, soundless as usual. I stopped partway down the hall, marched back, opened my mouth, and this time a choking sound came out - at this point, I'd attracted the attention of some other girl close to the door and I think it's safe to say that she thought I was bizarre. I got to the alcove right next to the class, flattened myself against the wall, and panicked. "I can do it! I can do it! Just pretend you're walking down the hall and you see her and you're trying to get her attention - perfectly innocent. Deep breath, don't pass out.". I peek around the corner - darn, people are walking down the hall - I briefly consider paying one of the guys $5 to yell out "Sponge!" for me. I take a super deep breath, force myself away from the wall, and fly past the door, crying "SPONGE!"
Sponge tells me that she collapsed in a fit of giggles, but I had already FLOWN back upstairs to my lab as if the professor himself was going to come out of the class, chasing me down the hall. I was shaking, my heart was racing, I was terrified. I was trembling so much it took me quite a bit of time to calm down enough to start my pipetting again.
But I did it :)