Please choose the correct ending to complete the given sentence: Rollerblading: A white screen appears and special affects reveal the words "howcast original". a man

Ending1: is talking while various clips of people rollerblading play and a screen pops up indicating that he's giving tips on " rollerblading basics: how to control speed on rollerblades ", and he picks up a pair of rollerblades and points to the wheels, then more clips of him rollerblading and showing examples plays. Ending2: is now standing on a chalk line and prepares to his completion. Ending3: talks next interviews and discusses the process of policing a dog. Ending4: appears shakes the man's hand and mentions " tool " and " teaching sportsman ".

Answer format: ending1/ending2/ending3/ending4