"My immediate thought was: 'I'm not really sweating yet, it'd only been about 15 minutes," said the man.
In the shower, Sandusky grabbed him from behind and said playfully: "I'm going to squeeze your guts out" and bear-hugged him, the man testified haltingly.
Sandusky also lifted him up to rinse shampoo out of his hair. "That's the last thing I remember about being in the shower. It's all black," said the man, identified in court documents as Victim 6.
The boy's mother reported the incident to university police and it was investigated but no charges were filed.
The man testified that he had continued to have contact with Sandusky. He sent Sandusky Father's Day and Thanksgiving Day greetings by email in 2009. The man said the email was one he had sent to all those on his list of friends.
When defense attorney Joe Amendola asked the witness: "Did the change in your attitude have anything to do with hiring an attorney and thinking that there might be some financial gain for you?," the man answered: "Zero."
Three alleged victims were set to testify against the 68-year-old Sandusky on Thursday after three others offered testimony on Wednesday accusing him of sexually abusing them in showers, bedrooms and basements when they were young boys.
Judge John Cleland told jurors at the close of Wednesday's session in Center County Court in Pennsylvania that the trial was running much more quickly than expected. The prosecution, which began presenting evidence on Monday, could conclude its case by Friday.
"It would appear that by Friday the commonwealth will have enough time comfortably" to finish, he said. At the trial's start, Cleland had said it would go on until the end of the month.
Of the alleged victims - known in court documents as Victims 1 to 10 - eight agreed to testify against Sandusky. Those who have testified have offered sometimes graphic accounts of abuse, including oral sex. Two of the accusers remain unidentified.
The defense has said it could call dozens of witnesses when it presents its case. They include Sandusky's wife Dottie and other family members.
Amendola has argued that the accusers are out for money. He has said that Sandusky might have acted inappropriately but is not a molester.
The trial is taking place amid a heavy media presence in the small town of Bellefonte, about 10 miles (16 kilometers) northeast of State College, site of Penn State's main campus.
Sandusky, who retired in 1999, is accused of meeting the boys through the Second Mile.
The case prompted the firing of university President Graham Spanier and head football coach Joe Paterno, record-holder for most wins by a major U.S. college football coach. Paterno died of lung cancer in January.
Intellpuke: You can read this Reuters article in context here: www.guardian.co.uk/world/2012/jun/14/jerry-sandusky-trial-witness