When Mauricio walks through the front door, everyone will yell, "Surprise!" The exclamation mark at the end of the sentence indicates strong or intense emphasis. In this scenario, Mauricio is likely to be taken aback or surprised by the sudden outburst of voices. The sentence suggests that there is a planned surprise event or celebration awaiting Mauricio's arrival. The moment he enters, everyone present will enthusiastically greet him with the exclamation "Surprise!"
The use of the word "everyone" implies that a group of people, possibly friends, family, or colleagues, is eagerly waiting for Mauricio's arrival to express their excitement and create a memorable surprise moment. This type of surprise is often associated with special occasions such as birthdays, anniversaries, or other significant events. The sentence conveys a sense of anticipation and highlights surprise as a source of joy and celebration.