From AMLopedia
The wacky attack was Marcus' special move on the trampoline. It all started one day when he was really hyper. Liam was doing something that made him mad, so he threatened to use the wacky attack on him. Liam dared him to try, so Marcus jumped on him and did a combination of the following things:
- Humping Liam vigorously
- Pulling his hair
- Screaming
From then on, this move was known as the wacky attack, and Marcus always thought that it was a really good move. Liam pretended that it actually hurt him so Marcus would never make up another one.