@JeremyECrawford Fighter's Pushing Attack: move target up to 15 feet
Does the fighter get to choose how far they push?
— Canadian DM (@CanaDutchian) May 25, 2016
"Up to X" represents a range of possibility, with X as the maximum. You decide how far to go, up to X. #DnD https://t.co/wX1niTJ566
— Jeremy Crawford (@JeremyECrawford) May 25, 2016