As a 15 year old, left at home, alone with dad's new spiffy Vega sitting in the drive way, I just had to take the new car out GTing around the neighbourhood.
Doing the four wheel drift around a corner, pound it into third gear, and the gas pedal goes to the floor and the engine goes to idle.
YIKES 15 minutes till dad gets home.
Lift the hood (always being petrol-sexual I knew it was a carb/throttle linkage problem).
First problem: Early Chevy Vegas didn't have a wing nut on the aircleaner (Who knew?) THE STUPID THING HAS FOUR 7/16 NUTS!
Went through my pockets, being a 15 year old kid in the early seventies, there wasn't much there BUT being a properly PREPARED 15 year kid in the early seventies I DID have my trusty Brewer's Retail opener (Who else remembers them?) that to my surprise works very well as a 7/16 wrench (5/8 too, we found out later, after extensive testing).
OK I got the aircleaner off, dig in abit, to find a linkage rod has fallen off because a carb clip has broken. HHHMMMMMmmmmm?
Tried a shoe lace. Nope, Too big. Back into my pockets to find a roach clip (I DID say I was a properly equipped 15 year old kid from the seventies didn't I?)
WORKED GREAT. Got home in time not to be found out... and the stupid roach clip was still there six years later when my idiot brother totalled the car in a flaming wreck.
Is that MacGyver enough for ya?