There are many special tasks in "Goat Simulator: Remastered". Standing on your head three times in a row is one of them. If you want to do this, you can press F to start slow motion, start walking on your front legs, and press F repeatedly. S and then W until you start walking on your front legs.
How to stand on your head three times in a row in Goat Simulator Remake
1. Press F to start slow motion and start walking on your front legs (press S and W repeatedly until you start walking on your front legs)
2. Front leg walking reaches a score of 300 or above
3. Jump and do a flip without falling.
4. Immediately after landing successfully, repeat action 1.
5. Complete it three times, the mission is accomplished!
As shown in the small white number in the upper left corner of the picture, only if the score is greater than 300 will it count!