Doing research in the summer is especially frustrating.
I opened 20 slots for subjects to come into the lab and participate in my experiment for class credit for next week. So far I have 2 people signed up and at least 1 will probably drop out. This, more than any other reason, is why people do research with monkeys (Note: this isn't true).
Thank goodness I have undergraduate research assistants and other grad students that I can badger into participating.