MacGyver became famous for solving problems using whatever "tools" he had on hand. In the pilot episode of the show, he solves nine distinct problems (according to this exhaustive list of problems solved by MacGyver, broken down by episode).
The most thrilling moment comes when he defuses a missile warhead using a paperclip, as a red timer counts down. Yes, it stops at 1 second. This is simply the best, purest MacGyver there is, complete with corny voiceover. Enjoy: