Witness depositions are often very dry affairs. A lot of mundane questions about subtle details that may or may not make a difference at trial- they are often used for discovering information, gaining admissions, and testing theories.
But sometimes they get very animated. For an amusing look at one such deposition, take a look at this one in Texas. (We watched this recently at a NITA deposition training- it is quite an entertaining look at an example of "depositions gone wild":
(By the way, the witness is right, sometimes we lawyers DO get a "case of insipient verbal diarrhea". . .)