Plan ahead

[Dave W]

This guy didn't. 

[gweimer]

It never hurts to have a basic understanding of physics.  Balance, leverage, force...

[Rhythm N. Bliss]

Funneeee hahaa

Both are Classic!!

[Granny Gremlin]

Reminds me of the time my (engineer fyi) friend decided to remove the front wheel off his motorcycle while it was on the kickstand.  I warned him ahead of time, but for some reason he didn't believe me, so I made sure to move to the back of the bike, and sure enough, it started to tip forward as he removed the wheel - I hopped onto the seat from the back and saved his forks from damage. He felt real dumb.

[the mojo hobo]

I have noticed that it seems many engineers lack common sense.

[godofthunder]

 Your sure the parking brake is on right ?