He was burned when he poured boiling water into the mug.
He was burned when he was pouring boiling water into the mug.
Which tense is better to use here if the action isn't long? Can we use Past Continuous even if the action lasted only 3-5 seconds?
If I have such kind of dilemma, can I say instead: "He was burned while pouring boiling water into the mug."?