Randy was trying to trick them into thinking the water bottle was moving on the fan. It swung back and bopped him in the head. Way to go Randy.
/r/instant_regret: "What have I done..." - Instant Regret (in'-stint rē-gret') n. a subreddit dedicated to deliberate actions that unexpectedly lead to undesirable consequences and horrible results; things which may cause someone to say, "oh man, did I just screw the pooch!" - May 9, 2022 - 02:10