This is ‘What Door Will The Ball Hit?’, a fun video created by Rube Goldberg machine aficionado and Youtuber Joseph’s Machines. If the title wasn’t hint enough, it’s your job to guess what door the ball will hit in increasingly complex Rube Goldberg machines. There’s also one round each of ‘What Crater Will The Ball Go In?’, ‘What Gift Will Be Untied?’, and ‘Which Appliance Will Get Turned On?’, for a total of six games. So — how many did you get right? I only got two and a half, and *winks* that’s only if you count me as an appliance.