Grammatical pattern: it + VERB + somebody + when + CLAUSE

The verbs in the list below follow this pattern.

amaze, anger, annoy, bother, bug, concern, confuse, delight, distress, disturb, embarrass, frustrate, irk, irritate, perplex, please, puzzle, scare, shock, stun, surprise, terrify, vex


See also the full discussion of the pattern it + VERB + somebody + when + CLAUSE.