walk in on
US /wɑːk ɪn ɑːn/
UK /wɑːk ɪn ɑːn/

1.
binnenlopen bij, betrappen op
to enter a room and see someone doing something private or embarrassing
:
•
I accidentally walked in on them while they were changing.
Ik liep per ongeluk binnen terwijl ze zich aan het omkleden waren.
•
She didn't want anyone to walk in on her while she was practicing her dance moves.
Ze wilde niet dat iemand binnenkwam terwijl ze haar danspasjes oefende.