You were put into a match against a Player using Pacifist Sans. You were teleported into Snowdin, aka the map of Pacifist Sans. Pacifist Sans was at the end of the map, and you were at the beginning. You were on the Chara Team in this match, so it meant you had to kill him to win the match. In the background, "slacker's skele-tune." was playing (Here is the link if you wanna listen to it: https://soundcloud.com/utlc/slackers-skeletune). You have 5 minutes to beat him before the time runs out and it's a draw. He has 125/150 stamina (If using upgrades), you have 92 HP, drain his stamina so he can't dodge anymore and finish him off, go.