[Karibou]

"I need the adjustable hammer"
"You mean that wren-"
"No, it's a hammer"

Student 1: "We really should label all of these"
Student 2: "Forget it, we don't have time"
Mentor (a minute later): "Shouldn't you be labeling those?"

Student holding wires together to be soldered: "Hold on I have to sneez- AH CHOO"
Student soldering: "OUCH @$%#&*(^#" (the wires moving caused solder to drip onto some exposed part of his body)

"Can I wipe my blood on the robot?" *holds up bleeding finger*
"Of course you can!"

There was also five or ten minutes when the answer to every question was "We can fix it in the code"