2005 Jeep Commander Engine problems

As my daughter was driving down a major parkway, at approximately 45 mph during day traffic hours, the jeep completely died while her foot was on accelerator. She thought she must have moved her foot around or wasn't sure if her knee or tennis shoe brushed the ignition but felt something caused the jeep to completely die. As she was still going down the parkway, she had to quickly shift the jeep into neutral and restart the engine while it was still moving and shift back into drive. Update 9/15/15*cw updated 12/28/15. *Jb